Curious George heads to a bookstore where his favorite author is signing books, but while waiting in line, he decides to browse and organize some open boxes.

When their grandfather buys a bookstore at auction in New Orleans, the Alden children help clean it up and discover that several people seem to be obsessed with the store and its contents.

"Mr. Paskey, owner of the Book Nook, plays an April Fools' Day prank on Dink, Josh, and Ruth Rose. They hatch a plan to get back at him, but then the bookstore is robbed--no joke! Can the kids track down the crook? Or will this April Fools' be an April fail?"--

When a new manager brings Snowball, a grouchy cat, to the shop where Raj and his owner live and work, Snowball informs Raj that he is not the tiger everyone believes him to be.

Mr. Brown hires Miss Button to help out in his bookstore. Realizing the two are "smitten" with one another, Cobweb, the cat and the bookstore's ghost devise a plan to bring the two together.

Relates the story of the National Memorial African Bookstore, founded in Harlem by Louis Michaux in 1939, as seen from the perspective of Louis Michaux Jr., who met famous men like Muhammad Ali and Malcolm X while helping there.

After a bookstore opens next door to their parents' pizza shop, strange things begin to happen. Bookshelves collapse, the fire alarm goes off, and the books disappear. Is someone sabotaging the bookstore? And when a secret message appears in the wall between the two stores, can nine-year-old Pete and eleven-year-old Penny Pizzarelli crack the case?