The description of the app states
"The Pearson eText app is a great companion to Pearson’s eText browser-based book reader. It allows existing subscribers who view their Pearson eText titles on a computer to additionally access their titles in a bookshelf on the iPad either online or via down-load.
With the Pearson eText app, book content is displayed with the highest quality fidelity to the print and online versions of the textbook. The Pearson eText app provides students and instructors with many of the same features available to web-based eText subscribers. The Pearson eText app provides full-text search capabilities, a notes manager, support for multimedia content, glossaries, note sharing and many other exciting features.
Access to your titles:
A valid Mastering/MyLab Pearson Username and Password is required to access your subscribed titles on the iPad. Please follow the instructions provided by your instructor to obtain a Pearson account or contact Pearson Customer Technical Support."