Iggy is delighted when Ada Twist's Aunt Bernice inherits a mansion featuring his favorite architectural periods, but unless the Questioneers can find its missing antiques, the house may be lost forever. Includes information about Art Deco and Art Nouveau, facts about unusual cats, a recipe for ice cream, and a biographical note on Ida B. Wells

In their magic treehouse, Jack and Annie are again transported to King Arthur's realm, where invisible beings, giant ravens, and mistaken magic spells have a duke's castle in an uproar on Halloween night.

Baron von Bubbles (Bub) the pug, Duchess the cat, and their human, Bella, are going to the countryside to visit Bella's grandmother for a few days, where they expect to have fun building forts and dressing up in the attic--but the attic seems to be haunted, and neither Bub nor Duchess can summon up the courage to face the ghost.