As my son is beginning to read we've both been a bit disappointed in some of the emergent reading books available. The limited word choice and lack of exciting plots doesn't help inspire him with the desire to read!
Then we picked up a few Elephant and Piggie Books at the library (by Mo Willems, author of Knuffle Bunny: A Cautionary Tale
and Don't Let the Pigeon Drive the Bus!).
The Elephant and Piggie books are hilarious (especially to a four year old), simple enough for him to get most of the words, exciting, and best of all they are helping him want to read! Oh, and did I mention that most of the books also have a good message about being nice to friends/helping others?! That is what I call a great book!
Go check some out!