The Phantom Tollbooth by Norton Juster, and illustrated by Jules Feiffer, was a really good book. I was so engrossed in reading it that I read it in one long morning. I recommend it for all ages.
It's about a kid named Milo who gets sent a tollbooth that leads to another world. The main characters' names are Tock, Milo, and Humbug. The whole book is basically a pun on words.
At one point in the book, when Milo has just gone through the tollbooth, he met this man called "the whether man." Milo asked him whether it was going to be sunny or rainy. The Whether Man answered, "How should I know?" Then, Milo said, "Well, you're the weather man." "I'm not the Weather Man, I'm the Whether Man. Don't you think it's a lot more important to know whether there is weather, rather than what kind of weather it is?"
Then, Milo asked him, "Is this the right road to Dictionapolis?" The Whether Man said, "I don't know if there are any wrong ways to Dictionopolis. If it's not the right road to Dictionapolis, then it's the right road to somewhere else."
I love this book because the verbal puns made me laugh.