The New Pack has Numbers 1-24 as Merlin Mission plus #1 World at War, 1944(Super Edition)
Magic Tree House Merlin Missions are more challenging adventures for the experienced Magic Tree House reader. In each adventure, Merlin the magician sends Jack and Annie on an adventure in the magic tree house.
Books in this Merlin Missions set include: Christmas in Camelot (#1), Haunted Castle on Hallows Eve (#2), Summer of the Sea Serpent (#3), Winter of the Ice Wizard (#4), Carnival at Candlelight (#5), Season of the Sandstorm (#6), Night of the New Magicians (#7), Blizzard of the Blue Moon (#8), Dragon of the Red Dawn (#9), Monday with a Mad Genius (#10), Dark Day in the Deep Sea (#11), Eve of the Emperor Penguin (#12), Moonlight on the Magic Flute (#13), A Good Night for Ghosts (#14), Leprechaun in Late Winter (#15), A Ghost Tale for Christmas (#16), A Crazy Day with Cobras (#17), Dogs in the Dead of Night (#18), Abe Lincoln at Last (#19), A Perfect Time for Pandas (#20), Stallion by Starlight (#21).
Magic Tree House books, with fiction and nonfiction titles, are perfect for parents and teachers using the Core Curriculum. With a blend of magic, adventure, history, science, danger, and cuteness, the topics range from kid pleasers (pirates, the Titanic, pandas) to curriculum perfect (rain forest, American Revolution, Abraham Lincoln) to seasonal shoo-ins (Halloween, Christmas, Thanksgiving). There is truly something for everyone here!