You are downloading the Shelf Player XAP file v18.104.22.168 for Windows Phone. Shelf Player is a free and useful Books & Reference app: Shelf Player is simple audio playing App which allows you to play audiobooks that you generate in the www.shelfmybooks.com platform. Shelf ... You can now download the offline XAP file to install & try it.
Download Locations for Shelf Player 22.214.171.124 XAP file
Important Notice: Now Due To Unspecified Limitations, You Can Not Use The Offline XAP File To Install It Any More.
To try to install it manually from an SD card, you should choose one of the server location above to get the offline Shelf Player XAP file, move the file to your phone's SD card and then tap 'Install local apps' in the phone's App list.