Want to hear more than 25 knock-knock jokes? No? Then don't buy this book. Those willing to have a giggle, however, will find this title adorable. Some of the jokes are predictable, and several are just retreaded for Halloween, but the majority are amusing, at least by knock-knock standards. Moreover, the book's design is quite clever and, with the help of the jokes, leads readers through a bit of a story. A boy and girl start out in a costume shop and on the next spread are shown walking the streets on Halloween night. They go to a party and are invited to a graveyard, where the ghouls are real and point the kids to a haunted mansion. Finally, the answer to "who's there" is part of the knock-knock: "Lettuce get out of here and go home." Lifting flaps on coffins and doors adds to the fun.

Cheerful Halloween-themed knock-knock jokes appear on every spread, often with a flap to lift in between setup and punch line. Some of the jokes and puns are surprising, others less so, but these groaners may be just the right addition to a Halloween routine. The cartoony illustrations are more humorous than creepy.

Knock, knock! / Who's there? / Ghouls! / Ghouls who? / Ghouls and boys both love Halloween!" And many kids love knock-knock jokes and cannot get enough of them. Teitelbaum comes through with this holiday collection of 28 jokes utilizing classic knock-knock form with wordplay and puns. Ho chooses to cast this series of jokes into a loose story of a girl and boy first preparing for Halloween and then having various adventures during Halloween night. As the two go from one activity and joke to the next, the format remains fairly consistent, with four jokes per double-page spread. A repeated lift-the-flap feature dedicated to a couple of the jokes on each spread as an interactive element as well as a chance for independent readers to guess the answer. Each flap has a unique shape and location on the page, and readers' eyes automatically jump to those parts of the book. This helps to create an enjoyable apprehension as readers turn the page. What is hidden there? Ho takes full advantage of the flaps, creating visual sleights of hand. The top of the flap leads readers to anticipate one answer to the joke, but often unexpected punch lines lurk below. Have this at the ready for a quick dose of gentle Halloween humor. (Early reader. 5-8)