Jack and Annie lead a perfectly normal life. Perfectly normal, that is, until they come across an abandoned tree house with the power to whisk the kids away to different times and places! Whether they're exploring the ancient pyramids of Egypt-and helping out the ghost of an Egyptian queen-or crossing the Delaware with General George Washington, Jack and Annie are always ready for another adventure. More importantly, the facts they learn along the way always provide the keys to completing their quests. The siblings love to read up on any subject-whether it's to crack codes, solve riddles, or simply get out of scrapes. And as readers follow along on each magical journey, they are introduced to all kinds of interesting information about different time periods, key historical figures, and various cultures and civilizations. With plenty of facts mixed in with tons of excitement, each book provides a great foundation of knowledge that supports future learning. Titles Included: #29 Christmas in Camelot #30 Haunted Castle on Hallows Eve #31 Summer of the Sea Serpent #32 Winter of the Ice Wizard #33 Carnival at Candlelight #34 Season of the Sandstorms #35 Night of the New Magicians #36 Blizzard of the Blue Moon #37 Dragon of the Red Dawn #38 Monday with a Mad Genius #39 Dark Day in the Deep Sea #40 Eve of the Emperor Penguin #41 Moonlight on the Magic Flute #42 A Good Night for Ghosts #43 Leprechaun in Late Winter #44 A Ghost Tale For Christmas Time #45 A Crazy Day With Cobras #46 Dogs in the Dead of Night #47 Abe Lincoln at Last #48 A Perfect Time for Pandas #49 Stallion by Starlight