You are downloading the 9Pad XAP file v18.104.22.168 for Windows Phone. 9Pad is a free and useful Books & Reference app: The best vvatpad client on Windows ... You can now download the offline XAP file to install & try it.
Download Locations for 9Pad 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 9Pad XAP file, move the file to your phone's SD card and then tap 'Install local apps' in the phone's App list.