April's roundup of New in Paperback titles includes THE MYSTERIOUS BENEDICT SOCIETY AND THE PERILOUS JOURNEY, the sequel to Trenton Lee Stewart's bestseller about four children who are brought together to go on secret missions that only the most intelligent and inventive youngsters can complete; RIVERS OF FIRE, a riveting follow-up to Patrick Carman's ATHERTON: THE HOUSE OF POWER, in which the world collapses and a new danger emerges; THE TRUTH ABOUT MY BAT MITZVAH, Nora Raleigh Baskin's novel about a seventh grader who has a growing interest in her Jewish identity; ELEVEN, a psychological mystery from Patricia Reilly Giff whose main character is a soon-to-be 11-year-old desperate to find out who he really is; and OGGIE COODER by Sarah Weeks, a chapter book that introduces readers to a fourth grader whose talent for charving (the carving and chewing of a piece of cheese with one's teeth) leads him on the path to fame and fortune.