The Costume Party, by Victoria Chess. (Translated from the French, Un si beau bal.) Summary: "On a rainy day, Madame Coco and her dogs have a costume party." Since that doesn't truly convey the "interesting" part of this one, let me explain. In a book where Madame Coco's five pet bull terriers sew their own costumes and decorate the living room with streamers, balloons and strings of lights, you can tell in every picture by the presence of one set of body parts or another which ones are the boy dogs (two of them) and which are the girl dogs (three of them). (Madame Coco also awards a prize for the best costume, but since she can't pick one she gives it to all of the dogs to share: a pet cat.)
Potty Poo-poo Wee-wee!, by Colin McNaughton. Summary: "When everyone tells Littlesaurus to use his potty, he ignores them and exclaims 'Potty poo poo wee wee!' until his grandmother gives him some important information." What the summary leaves out is that throughout the book, instead of using the potty when people tell him to, Littlesaurus (who constantly wears bright orange pants, red Converse high-tops, and a purple baseball cap) leaves head-sized steaming (yes, steaming) piles of poo wherever he is at the time--including at school and on the beach. And the important information granny tells him? That his father did exactly the same thing at the same age. Gosh, what a great way to be an enabler of inappropriate behavior and to undercut your kids' parenting, granny. Then Daddysaurus yells at the kid that he doesn't care if the kid never uses the potty, which magically causes the contrary kid to decide to use it, at which point everyone else repeats Littlesaurus' rude exclamation. End of book.
Snog the Frog, by Tony Bonning. Summary "Snog the Frog lives in a pond near a castle. In the castle lives a little princess. If she kisses Snog the Frog will he turn into a prince?" Nice job spoiling the point of the book in the title there. And no, the frog doesn't turn into a prince--but not for lack of urging the princess to kiss him, then kiss him again, then kiss him again, thereby making him "feel like a prince." (And yes, that's the punchline of the book.)
Seven Spunky Monkeys, by Jackie French Koller. Summary: "One by one, seven monkeys who go out to have a good time wind up falling in love over the course of a week." How can one read that title and that summary and not have one's mind dive straight for the gutter?
Feudalism: Serf & Turf