Benjamin D. Geballe

When Percy Jackson receives an urgent distress call from his friend Grover, he immediately prepares for battle. He knows he'll need his powerful demigod allies, Annabeth and Thalia, at his side; his trusty bronze sword, Riptide; and...a ride from his mom.

The Magnus Chase and the Gods of Asgard trilogy may have concluded, but we haven't heard the last of our favorite peeps from the Nine Worlds. Join Hearthstone, Blitzen, Samirah, Alex, Jack, T.J., Mallory, Halfborn, and more on a hilarious and unforgettable journey through Rick Riordan's unique take on Norse mythology. While Magnus is off visiting his cousin, Annabeth, his friends find themselves in some sticky, hairy, and smelly situations as they try to outwit moronic giants, murderous creatures, and meddlesome gods. Can they stave off Ragnarok at least until Magnus gets back?

In Night of the Ninjas, Jack and Annie meet a real live ninja when the Magic Tree House whisks them back to ancient Japan in search of enchantress Morgan le Fay, who holds the answer to the origins of the Tree House. When they arrive, they find themselves in the cave of a ninja master. Will they learn the secrets of the ninja? Or will the evil samurai warriors get them first?