Christmas in Camelot (Magic Tree House, No. 29)
A cup, a compass, a key: the magic tree house has brought siblings Annie  and Jack to Camelot, where they embark on a mysterious mission to find these  enigmatic gifts. In this special hardcover addition to the bestselling Magic  Tree House series, the young adventurers must travel to the Otherworld, an  "ancient, enchanted land beyond the edge of the Earth, the place where all magic  began" to save Camelot from dark wizard Mordred's evil spell. If they fail,  Camelot will be forgotten forever. Fans of the beloved, highly readable series  by Mary Pope Osborne will rise to the challenge of this longer, more complex  companion to her other titles, which includeEarthquake in the Early MorningandTwister on Tuesday.  As in every story in the sequence, Jack and Annie bravely plunge into their  quest, learning about a culture and time very far removed from their own, and  prove once again that children can make a difference. (Ages 6 to 9)--Emilie Coulter