First, I would not classify this as a picture book, but rather a very short chapter book with pictures. The story is written for a school age audience rather than younger children. The illustrations are pencil drawings. The are beautiful and rich. The reason I would not recommend this book for little children is because as the characters play the game, Jumani, many disastrous and scary things happen such as a lion chasing them.
The movie adaption of this book is quite different although it keeps the basic concept of playing the Jumanji game. I love the movie and would recommend this book based mostly on the amazing illustrations.
Would I recommend this book? YES for ages 8 and up.