** The current price is an introductory offer, so don't wait too long! **
This is the Pro upgrade for BooksApp.
By upgrading you get the ability to export and import books, in addition to removing all ads.
You can export books in two ways, either as a spreadsheet—which you can send to anyone—or to Google Docs¹. The spreadsheet is a CSV (Comma-separated values) file that you can open in any spreadsheet program. You can also send the file to other BooksApp users, both Android and iPhone users.
Importing books is done by opening a CSV file from an e-mail or from the file manager.
N.B. You must install BooksApp before upgrading to BooksApp Pro.
¹) Google Docs export requires Android 2.1 or later.