This striking pop-up book published under the imprimatur of paper engineers Robert Sabuda and Matthew Reinhart, introduces a medieval European castle and the activities within it. Open the first double-page spread and up pops a three-dimensional castle, including its walls, courtyard, and drawbridge, with two smaller gatefold pages revealing other pop-up scenes. From the alchemist in the tower to the prisoners in the torture chamber, the vision of medieval times seems romanticized and the text secondary to the pleasing artwork and paper engineering. Still, Olmon provides plenty of interesting facts about the castle, its inhabitants, and their activities, and what other book includes a working, pop-up catapult that can shoot a spitball three feet?