This is a companion app for 39;chess book Study39; app. This app cannot be launched on its own. Please install Chess Book Study
This is a modified version of the excellent EBookDroid app
https:play.google comstoreappsdetails?idcom.pereira.booknboard

note

1. This is based on the open source EBookDroid app
http:code.google.compebookdroid
2. The original EBookDroid app is here
https:play.google.comstoreappsdetails?idorg.ebookdroidamp;hlen