diff --git a/CHANGELOG.md b/CHANGELOG.md
index 499f98c47..0e833967a 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,74 @@
+# [1.9.0](https://github.com/gotson/komga/compare/1.8.4...1.9.0) (2023-12-15)
+## 🚀 Features
+**api**
+- increase PDF image resolution ([e856d4f](https://github.com/gotson/komga/commits/e856d4f))
+- make pre-paginated epub containing only images compatible with divina profile ([c2a4d17](https://github.com/gotson/komga/commits/c2a4d17))
+- add basic metadata for transient books ([1050f52](https://github.com/gotson/komga/commits/1050f52))
+- add Readium Progression API ([20799ad](https://github.com/gotson/komga/commits/20799ad))
+- add layout attribute on epub manifest ([5096364](https://github.com/gotson/komga/commits/5096364))
+- add positions endpoint to get pre-computed positions of epub books ([eb8a644](https://github.com/gotson/komga/commits/eb8a644))
+
+**epubreader**
+- handle reading direction ([77b8a32](https://github.com/gotson/komga/commits/77b8a32))
+- remove margin and dropshadow for pre-paginated publications ([10e2597](https://github.com/gotson/komga/commits/10e2597))
+- mark read progress ([1172911](https://github.com/gotson/komga/commits/1172911))
+- adjust display of current progress ([b234586](https://github.com/gotson/komga/commits/b234586))
+- add navigation modes with click/tap, buttons, or both ([2f0f94d](https://github.com/gotson/komga/commits/2f0f94d))
+- display percentage of total progression ([3a14990](https://github.com/gotson/komga/commits/3a14990))
+
+**komga**
+- relax epub validity controls ([fad93ad](https://github.com/gotson/komga/commits/fad93ad))
+
+**komga-tray**
+- display dialog with error detail on application startup failure ([0fdcb2a](https://github.com/gotson/komga/commits/0fdcb2a)), closes [#1336](https://github.com/gotson/komga/issues/1336)
+
+**opds-v1**
+- add OPDS-PSE links for divina-compatible EPUBs ([0c96054](https://github.com/gotson/komga/commits/0c96054))
+- use static xml namespace prefix for opds-pse ([834b51d](https://github.com/gotson/komga/commits/834b51d))
+
+**webui**
+- use divina reader for compatible epub ([809a794](https://github.com/gotson/komga/commits/809a794)), closes [#1324](https://github.com/gotson/komga/issues/1324)
+- autofill series and number from metadata during book import ([5b75345](https://github.com/gotson/komga/commits/5b75345)), closes [#998](https://github.com/gotson/komga/issues/998)
+
+## 🐛 Fixes
+**api**
+- properly set layout property in webpub manifest ([e11ce46](https://github.com/gotson/komga/commits/e11ce46))
+- cannot get last page of PDF ([721c5d1](https://github.com/gotson/komga/commits/721c5d1)), closes [#1341](https://github.com/gotson/komga/issues/1341)
+
+**epubreader**
+- properly handle clicks in iframes ([4db0542](https://github.com/gotson/komga/commits/4db0542))
+
+**komga**
+- empty generated thumbnails would be saved in DB ([15920b7](https://github.com/gotson/komga/commits/15920b7)), closes [#1338](https://github.com/gotson/komga/issues/1338)
+- use an in-process lock for Lucene ([1a30bf9](https://github.com/gotson/komga/commits/1a30bf9))
+
+**webui**
+- pre-render page could overlap current page in some specific conditions ([7a8d50c](https://github.com/gotson/komga/commits/7a8d50c)), closes [#1339](https://github.com/gotson/komga/issues/1339)
+
+## 🏎 Perf
+**komga**
+- convert BookMetadataProvider to property ([3843f77](https://github.com/gotson/komga/commits/3843f77))
+
+## 🔄️ Changes
+**komga**
+- move date utils to language package ([fbc1034](https://github.com/gotson/komga/commits/fbc1034))
+
+**komga-tray**
+- catch any exception on startup ([b312847](https://github.com/gotson/komga/commits/b312847))
+
+## 🌐 Translation
+**komga-tray**
+- translated using Weblate (Chinese (Simplified)) ([142326c](https://github.com/gotson/komga/commits/142326c))
+- translated using Weblate (Finnish) ([d19e1a5](https://github.com/gotson/komga/commits/d19e1a5))
+- translated using Weblate (Spanish) ([ad6a8c9](https://github.com/gotson/komga/commits/ad6a8c9))
+
+**webui**
+- fix language file name ([ac59fca](https://github.com/gotson/komga/commits/ac59fca)), closes [#1345](https://github.com/gotson/komga/issues/1345)
+- translated using Weblate (Chinese (Simplified)) ([0274308](https://github.com/gotson/komga/commits/0274308))
+- translated using Weblate (Spanish) ([37abfbf](https://github.com/gotson/komga/commits/37abfbf))
+- translated using Weblate (Catalan) ([32e9a0c](https://github.com/gotson/komga/commits/32e9a0c))
+- translated using Weblate (German) ([d2a91ac](https://github.com/gotson/komga/commits/d2a91ac))
+
 # [1.8.4](https://github.com/gotson/komga/compare/1.8.3...1.8.4) (2023-12-06)
 ## 🐛 Fixes
 **webui**
diff --git a/gradle.properties b/gradle.properties
index 7504783a0..21a41ceb2 100644
--- a/gradle.properties
+++ b/gradle.properties
@@ -1,2 +1,2 @@
-version=1.8.4
+version=1.9.0
 org.gradle.jvmargs=-Xmx2G
diff --git a/komga/docs/openapi.json b/komga/docs/openapi.json
index 1c1ea8c6c..95c8127a5 100644
--- a/komga/docs/openapi.json
+++ b/komga/docs/openapi.json
@@ -606,6 +606,87 @@
         }
       }
     },
+    "/api/v1/books/{bookId}/progression": {
+      "get": {
+        "tags": [
+          "book-controller"
+        ],
+        "operationId": "getProgression",
+        "parameters": [
+          {
+            "name": "bookId",
+            "in": "path",
+            "required": true,
+            "schema": {
+              "type": "string"
+            }
+          }
+        ],
+        "responses": {
+          "400": {
+            "description": "Bad Request",
+            "content": {
+              "*/*": {
+                "schema": {
+                  "$ref": "#/components/schemas/ValidationErrorResponse"
+                }
+              }
+            }
+          },
+          "200": {
+            "description": "OK",
+            "content": {
+              "application/vnd.readium.progression+json": {
+                "schema": {
+                  "$ref": "#/components/schemas/R2Progression"
+                }
+              }
+            }
+          }
+        }
+      },
+      "put": {
+        "tags": [
+          "book-controller"
+        ],
+        "operationId": "markProgression",
+        "parameters": [
+          {
+            "name": "bookId",
+            "in": "path",
+            "required": true,
+            "schema": {
+              "type": "string"
+            }
+          }
+        ],
+        "requestBody": {
+          "content": {
+            "application/json": {
+              "schema": {
+                "$ref": "#/components/schemas/R2Progression"
+              }
+            }
+          },
+          "required": true
+        },
+        "responses": {
+          "400": {
+            "description": "Bad Request",
+            "content": {
+              "*/*": {
+                "schema": {
+                  "$ref": "#/components/schemas/ValidationErrorResponse"
+                }
+              }
+            }
+          },
+          "204": {
+            "description": "No Content"
+          }
+        }
+      }
+    },
     "/api/v1/books/thumbnails": {
       "put": {
         "tags": [
@@ -8110,6 +8191,46 @@
         }
       }
     },
+    "/api/v1/books/{bookId}/positions": {
+      "get": {
+        "tags": [
+          "book-controller"
+        ],
+        "operationId": "getPositions",
+        "parameters": [
+          {
+            "name": "bookId",
+            "in": "path",
+            "required": true,
+            "schema": {
+              "type": "string"
+            }
+          }
+        ],
+        "responses": {
+          "400": {
+            "description": "Bad Request",
+            "content": {
+              "*/*": {
+                "schema": {
+                  "$ref": "#/components/schemas/ValidationErrorResponse"
+                }
+              }
+            }
+          },
+          "200": {
+            "description": "OK",
+            "content": {
+              "application/vnd.readium.position-list+json": {
+                "schema": {
+                  "$ref": "#/components/schemas/R2Positions"
+                }
+              }
+            }
+          }
+        }
+      }
+    },
     "/api/v1/books/{bookId}/pages": {
       "get": {
         "tags": [
@@ -9509,6 +9630,105 @@
         },
         "description": "Fields to update. You can omit fields you don\u0027t want to update."
       },
+      "Location": {
+        "required": [
+          "fragments"
+        ],
+        "type": "object",
+        "properties": {
+          "fragments": {
+            "type": "array",
+            "items": {
+              "type": "string"
+            }
+          },
+          "progression": {
+            "type": "number",
+            "format": "float"
+          },
+          "position": {
+            "type": "integer",
+            "format": "int32"
+          },
+          "totalProgression": {
+            "type": "number",
+            "format": "float"
+          }
+        }
+      },
+      "R2Device": {
+        "required": [
+          "id",
+          "name"
+        ],
+        "type": "object",
+        "properties": {
+          "id": {
+            "type": "string"
+          },
+          "name": {
+            "type": "string"
+          }
+        }
+      },
+      "R2Locator": {
+        "required": [
+          "href",
+          "type"
+        ],
+        "type": "object",
+        "properties": {
+          "href": {
+            "type": "string"
+          },
+          "type": {
+            "type": "string"
+          },
+          "title": {
+            "type": "string"
+          },
+          "locations": {
+            "$ref": "#/components/schemas/Location"
+          },
+          "text": {
+            "$ref": "#/components/schemas/Text"
+          }
+        }
+      },
+      "R2Progression": {
+        "required": [
+          "device",
+          "locator",
+          "modified"
+        ],
+        "type": "object",
+        "properties": {
+          "modified": {
+            "type": "string",
+            "format": "date-time"
+          },
+          "device": {
+            "$ref": "#/components/schemas/R2Device"
+          },
+          "locator": {
+            "$ref": "#/components/schemas/R2Locator"
+          }
+        }
+      },
+      "Text": {
+        "type": "object",
+        "properties": {
+          "after": {
+            "type": "string"
+          },
+          "before": {
+            "type": "string"
+          },
+          "highlight": {
+            "type": "string"
+          }
+        }
+      },
       "UserCreationDto": {
         "required": [
           "email",
@@ -9708,6 +9928,13 @@
           },
           "comment": {
             "type": "string"
+          },
+          "number": {
+            "type": "number",
+            "format": "float"
+          },
+          "seriesId": {
+            "type": "string"
           }
         }
       },
@@ -11165,6 +11392,7 @@
           "letterer",
           "penciler",
           "publisher",
+          "rendition",
           "subject",
           "title",
           "translator"
@@ -11291,6 +11519,12 @@
           },
           "belongsTo": {
             "$ref": "#/components/schemas/WPBelongsToDto"
+          },
+          "rendition": {
+            "type": "object",
+            "additionalProperties": {
+              "type": "object"
+            }
           }
         }
       },
@@ -11590,10 +11824,10 @@
             "type": "integer",
             "format": "int32"
           },
-          "paged": {
+          "unpaged": {
             "type": "boolean"
           },
-          "unpaged": {
+          "paged": {
             "type": "boolean"
           },
           "offset": {
@@ -12331,6 +12565,7 @@
       "MediaDto": {
         "required": [
           "comment",
+          "epubDivinaCompatible",
           "mediaProfile",
           "mediaType",
           "pagesCount",
@@ -12351,6 +12586,9 @@
           "comment": {
             "type": "string"
           },
+          "epubDivinaCompatible": {
+            "type": "boolean"
+          },
           "mediaProfile": {
             "type": "string"
           }
@@ -12406,6 +12644,8 @@
         "required": [
           "completed",
           "created",
+          "deviceId",
+          "deviceName",
           "lastModified",
           "page",
           "readDate"
@@ -12430,6 +12670,12 @@
           "lastModified": {
             "type": "string",
             "format": "date-time"
+          },
+          "deviceId": {
+            "type": "string"
+          },
+          "deviceName": {
+            "type": "string"
           }
         }
       },
@@ -12861,6 +13107,25 @@
           }
         }
       },
+      "R2Positions": {
+        "required": [
+          "positions",
+          "total"
+        ],
+        "type": "object",
+        "properties": {
+          "total": {
+            "type": "integer",
+            "format": "int32"
+          },
+          "positions": {
+            "type": "array",
+            "items": {
+              "$ref": "#/components/schemas/R2Locator"
+            }
+          }
+        }
+      },
       "MediaType": {
         "type": "object",
         "properties": {