Similar to Chasing Vermeer (by this same author) and Shakespeare's Secret by Elise Broach and every bit as enjoyable. In each, a group of kids stumble upon a mystery that ties back to a historical figure - both educational and entertaining.
Any puzzle lover, mystery lover, or Frank Lloyd Wright enthusiast will love this book. Great story, great characters, will keep you puzzling til the end. Lots of fun, very quick read.