Install EPUB Parser
Sign in on creating user
Set title on uploading file
Display "Unknown title" as book title when title is empty
Display user name in book list
Respond with 404 when book not found
Execute Foreigner.load in Padrino.after_load
Add NOT NULL constraint to books.user_id
Add NOT NULL constraint to books.epub
Add delete buttons for books
Add validation for file size
Set extension white list for EPUB files
Use filename as book title when parse as EPUB failured
Change field name to upload file