As Microsoft's partner, Foxit Software company has a number of award-winning products, especially its most popular Foxit PDF Reader for both free and commercial uses. And the Foxit PhantomPDF provides a centralized and complete PDF document solution specially for business/company users, and it has become a sensible alternative to Adobe Acrobat for an increasing number of commercial users.

Foxit Reader is really useful, but I don't know whether you have ever used the Adobe Digital Editions (ADE for short) or not, it tends to the management of e-books, and finally makes you build your own ebooks library.