Alvin^Schwartz Librarian Note: There is more than one author in the Goodreads database with this name.
Alvin Schwartz was the author of more than fifty books dedicated to and dealing with topics such as folklore and word play, many of which were intended for young readers. He is often confused with another Alvin_Schwartz, who wrote Superman and Batman daily comics strips and a novel titled The Blowtop.
Lots are jokes. Organization is poor, as the book starts by tricking the reader unfairly, and only later teaches about the different kinds of riddles. Worth reading if you find a copy handy, as I did in a Little Free Library, but not worth buying. Btw, I was surprised to see the extensive notes and bibliography... like a scholarly book!
Notes: awesome brainteaser book loaded with riddles that are smart -- not joke-type riddles the only problem is the solutions are too easy to "accidentally" look at