diff --git a/komga/build.gradle.kts b/komga/build.gradle.kts
index 5fc8c28a1..82537875f 100644
--- a/komga/build.gradle.kts
+++ b/komga/build.gradle.kts
@@ -76,6 +76,8 @@ dependencies {
   implementation("com.twelvemonkeys.imageio:imageio-tiff:3.4.2")
   implementation(files("$projectDir/libs/webp-imageio-decoder-plugin-0.2.jar"))
 
+  implementation("com.jakewharton.byteunits:byteunits:0.9.1")
+
   runtimeOnly("com.h2database:h2")
 
   testImplementation("org.springframework.boot:spring-boot-starter-test") {
diff --git a/komga/src/main/kotlin/org/gotson/komga/domain/model/Book.kt b/komga/src/main/kotlin/org/gotson/komga/domain/model/Book.kt
index bae427df5..3c976e374 100644
--- a/komga/src/main/kotlin/org/gotson/komga/domain/model/Book.kt
+++ b/komga/src/main/kotlin/org/gotson/komga/domain/model/Book.kt
@@ -1,5 +1,6 @@
 package org.gotson.komga.domain.model
 
+import com.jakewharton.byteunits.BinaryByteUnit
 import org.apache.commons.io.FilenameUtils
 import java.net.URL
 import java.nio.file.Path
@@ -29,7 +30,10 @@ class Book(
     var url: URL,
 
     @Column(name = "file_last_modified", nullable = false)
-    var fileLastModified: LocalDateTime
+    var fileLastModified: LocalDateTime,
+
+    @Column(name = "file_size", nullable = false)
+    var fileSize: Long = 0
 ) : AuditableEntity() {
   @Id
   @GeneratedValue
@@ -49,9 +53,13 @@ class Book(
       field = value
     }
 
-  fun filename(): String = FilenameUtils.getName(url.toString())
+  fun fileName(): String = FilenameUtils.getName(url.toString())
+
+  fun fileExtension(): String = FilenameUtils.getExtension(url.toString())
 
   fun path(): Path = Paths.get(this.url.toURI())
 
+  fun fileSizeHumanReadable(): String = BinaryByteUnit.format(fileSize)
+
   override fun toString(): String = url.toURI().path
 }
diff --git a/komga/src/main/kotlin/org/gotson/komga/domain/service/FileSystemScanner.kt b/komga/src/main/kotlin/org/gotson/komga/domain/service/FileSystemScanner.kt
index 9375863da..4e8fc2c3d 100644
--- a/komga/src/main/kotlin/org/gotson/komga/domain/service/FileSystemScanner.kt
+++ b/komga/src/main/kotlin/org/gotson/komga/domain/service/FileSystemScanner.kt
@@ -51,7 +51,8 @@ class FileSystemScanner(
                       Book(
                           name = FilenameUtils.getBaseName(it.fileName.toString()),
                           url = it.toUri().toURL(),
-                          fileLastModified = it.getUpdatedTime()
+                          fileLastModified = it.getUpdatedTime(),
+                          fileSize = Files.readAttributes(it, BasicFileAttributes::class.java).size()
                       )
                     }.toList()
               }
diff --git a/komga/src/main/kotlin/org/gotson/komga/domain/service/LibraryScanner.kt b/komga/src/main/kotlin/org/gotson/komga/domain/service/LibraryScanner.kt
index ea59913a9..144753be8 100644
--- a/komga/src/main/kotlin/org/gotson/komga/domain/service/LibraryScanner.kt
+++ b/komga/src/main/kotlin/org/gotson/komga/domain/service/LibraryScanner.kt
@@ -63,6 +63,7 @@ class LibraryScanner(
                 logger.info { "Book changed on disk, update and reset metadata status: $newBook" }
                 existingBook.fileLastModified = newBook.fileLastModified
                 existingBook.name = newBook.name
+                existingBook.fileSize = newBook.fileSize
                 existingBook.metadata.reset()
               }
               existingBook
diff --git a/komga/src/main/kotlin/org/gotson/komga/interfaces/web/opds/OpdsController.kt b/komga/src/main/kotlin/org/gotson/komga/interfaces/web/opds/OpdsController.kt
index f55ffc916..85dd98cb8 100644
--- a/komga/src/main/kotlin/org/gotson/komga/interfaces/web/opds/OpdsController.kt
+++ b/komga/src/main/kotlin/org/gotson/komga/interfaces/web/opds/OpdsController.kt
@@ -75,21 +75,21 @@ class OpdsController(
               title = "All series",
               updated = ZonedDateTime.now(),
               id = ID_SERIES_ALL,
-              content = "All series.",
+              content = "Browse by series",
               link = OpdsLinkFeedNavigation(OpdsLinkRel.SUBSECTION, "${ROUTE_BASE}${ROUTE_SERIES_ALL}")
           ),
           OpdsEntryNavigation(
               title = "Latest series",
               updated = ZonedDateTime.now(),
               id = ID_SERIES_LATEST,
-              content = "Latest series.",
+              content = "Browse latest series",
               link = OpdsLinkFeedNavigation(OpdsLinkRel.SUBSECTION, "${ROUTE_BASE}${ROUTE_SERIES_LATEST}")
           ),
           OpdsEntryNavigation(
               title = "All libraries",
               updated = ZonedDateTime.now(),
               id = ID_LIBRARIES_ALL,
-              content = "All libraries.",
+              content = "Browse by library",
               link = OpdsLinkFeedNavigation(OpdsLinkRel.SUBSECTION, "${ROUTE_BASE}${ROUTE_LIBRARIES_ALL}")
           )
       )
@@ -248,11 +248,11 @@ class OpdsController(
           title = name,
           updated = lastModifiedDate?.atZone(ZoneId.systemDefault()) ?: ZonedDateTime.now(),
           id = id.toString(),
-          content = "",
+          content = "$name (${fileExtension().toUpperCase()}) (${fileSizeHumanReadable()})",
           links = listOf(
               OpdsLinkImageThumbnail("image/jpeg", "/api/v1/series/${series.id}/books/$id/thumbnail"),
               OpdsLinkImage(metadata.pages[0].mediaType, "/api/v1/series/${series.id}/books/$id/pages/1"),
-              OpdsLinkFileAcquisition(metadata.mediaType, "/api/v1/series/${series.id}/books/$id/file/${filename()}"),
+              OpdsLinkFileAcquisition(metadata.mediaType, "/api/v1/series/${series.id}/books/$id/file/${fileName()}"),
               OpdsLinkPageStreaming("image/jpeg", "/api/v1/series/${series.id}/books/$id/pages/{pageNumber}?convert=jpeg&zero_based=true", metadata.pages.size)
           )
       )
diff --git a/komga/src/main/kotlin/org/gotson/komga/interfaces/web/rest/SeriesController.kt b/komga/src/main/kotlin/org/gotson/komga/interfaces/web/rest/SeriesController.kt
index 8d3079310..4208591d6 100644
--- a/komga/src/main/kotlin/org/gotson/komga/interfaces/web/rest/SeriesController.kt
+++ b/komga/src/main/kotlin/org/gotson/komga/interfaces/web/rest/SeriesController.kt
@@ -190,7 +190,7 @@ class SeriesController(
         ResponseEntity.ok()
             .headers(HttpHeaders().apply {
               contentDisposition = ContentDisposition.builder("attachment")
-                  .filename(book.filename())
+                  .filename(book.fileName())
                   .build()
             })
             .contentType(getMediaTypeOrDefault(book.metadata.mediaType))
@@ -299,6 +299,8 @@ data class BookDto(
     val url: String,
     @JsonFormat(pattern = "yyyy-MM-dd'T'HH:mm:ss")
     val lastModified: LocalDateTime?,
+    val sizeBytes: Long,
+    val size: String,
     val metadata: BookMetadataDto
 )
 
@@ -313,6 +315,8 @@ fun Book.toDto() =
         name = name,
         url = url.toURI().path,
         lastModified = lastModifiedDate?.toUTC(),
+        sizeBytes = fileSize,
+        size = fileSizeHumanReadable(),
         metadata = BookMetadataDto(
             status = metadata.status.toString(),
             mediaType = metadata.mediaType ?: ""
diff --git a/komga/src/main/resources/db/migration/V20191029153618__book_filesize.sql b/komga/src/main/resources/db/migration/V20191029153618__book_filesize.sql
new file mode 100644
index 000000000..c4d558ae1
--- /dev/null
+++ b/komga/src/main/resources/db/migration/V20191029153618__book_filesize.sql
@@ -0,0 +1,8 @@
+alter table book
+    add (file_size bigint default 0);
+
+-- force rescan to update file size of all books
+update series
+set file_last_modified = '1970-01-01 00:00:00';
+update book
+set file_last_modified = '1970-01-01 00:00:00';