Is there a PDF/eBook Reader like the "Google Playbook"  Tablet?
There are several apps you might check (ordered best recommendation first):


Moon+ Reader Pro is the best ebook reader I know. Support for the important formats (txt, html, epub, pdf, umd, fb2, chm, zip -- pdf only in the pro, said to be the fastest PDF renderer on Android), plenty libraries pre-configured to download books from (you can add your own sources), great support, and more. Just no DRM (yet; as Adobe didn't answer to the developers requests). My clear recommendation for this one.
Aldiko Book Reader supports epub, PDF, DRM -- and also can access online sources
Mantano Reader supports epub &amp; PDF, available in several versions, supports DRM
GO Book supports epub, txt, umd, pdf and fb2 (DRM/catalogs support: unknown to me)


There are some more on the Playstore, but not all are recommendable (and some may have escaped my notice).