It's a book by Martin Gardner (the Mathematical Games guy), edited by Ken Jennings (the Jeopardy! guy). So you might expect it to be pretty amazing. But it's a book of little word puzzles of the sort Gardner liked to present, the sort of thing you could use to win a bar bet. And I've heard all of those from all the other wordplay books I used to pick up, except then I stopped because they all just re-hash the same... Oh wait. The Colossal Book of Wordplay had some tricks I hadn't seen before. That's pretty amazing right there. If you like wordplay, check it out.