Walter Bean is happiest when he gets to spend time tinkering on his inventions in his grandfather's workshop, but when his grandfather acquires a curse, Walter must embark on dangerous quest to return a pearl skull to the witches who made it.
Ravenpaw, having left the warrior Clans and enjoying his new life on a peaceful farm, teams up with his new friend, Barley, to protect his life when five rogue cats from Twolegplace arrive.
While their parents are away doing research, brothers Duffy and Sumo Pugg go with their cousin, Mister Come-and-Go, to Kokalaha Island, where they meet Aunt Lulu and become trapped in an erupting volcano.
Jack Putnam and his little brother Benny are dragged along on a summer vacation to Chowder Bay, Maine, and their previously boring trip turns into an adventure to a mysterious locale with giant lobsters, Civil War ghosts, and kleptomaniac eagles.