downloading pdf readers

I have a set of books on my computer. They r pdf format I want a pdf reader for my pandigtal tablet, HELP

Kingsoft Office works great

Kingsoft Office works great for me, free too.

craig tablet by android

i have the app for gooogle music but i cant get it to play without the adobe flash player app and it said my tablet is not compatable for the app but it was workng before but not now can u help