The Wright 3 (by Blue Balliett)

Then their teacher, Ms. Hussey, introduces them to a tragedy in the making -- Frank Lloyd Wright's Robie House is about to be cut into four pieces and sent to different museums. The kids and teacher quickly organize an effective protest that gets plenty of media and political attention.

But there's more going on at Robie House than meets the eye: strange lights, worker injuries, hidden codes, and a house that may have a mind of its own bring the trio together to solve the mystery and save the house.

Kids who liked Chasing Vermeer will probably enjoy this sequel about unlikely friends saving a Frank Lloyd Wright house -- and solving a mystery. There are more art crimes, more clues hidden in pictures, more codes to solve, more pentominoes, more mathematical, literary, and historical connections -- more of everything that made the first book fun. But somehow it adds up to less.

The clever bits are mostly extraneous: You don't need to find the hidden pictures or decode the codes or understand pentominoes to follow the story -- none of them are integral. The author introduces interesting strands, characters, and ideas and then drops them without their having served any purpose. It's all pleasant and interesting, in a tepid sort of way, and some kids will enjoy it.