As a reader, you find materials you enjoy, and others you appreciate less. You form opinions, likes and dislikes. You feel confident in recommending good books to others. Seek good books by word of mouth, at libraries, on the shelves of your friends, and in book stores, both bricks and mortar and online.
I am happy to list these links where good books are to be found:
GoodKindles - where writers meet readers
David provides great book publicity. Ask David
Kindle Books and Tips is where everyone goes for REALLY up-to-date info on books.