October's roundup of New in Paperback titles includes RAVEN'S GATE, book one in the chilling Gatekeepers series by Alex Rider author Anthony Horowitz; THE Blue Djinn of Babylon, a continuation of Children of the Lamp, P. B. Kerr's wildly entertaining and magical adventure trilogy; THE LAST HOLIDAY CONCERT, a middle-grade novel about teamwork from the master of the school story, Andrew Clements; and the exciting conclusion of the action-packed Lionboy trilogy by mother-and-daughter writing team Zizou Corder.