In the fallout from HOUSE OF M and following the surprise film-noir hit MADROX, a new mutant team is forged! X-Factor is an investigative mutant agency that includes Madrox, the Multiple Man; Guido, the Strong Guy; Wolfsbane, the shape-shifter; Siryn, the chorus girl; Rictor, the living earthquake; and Generation X's Monet, the pompous witch. Drawn together in the heart of District X, this rag-tag band of heroes has a lot of answers to find, and fast! Bonus: A key player from House of M will play a major role in X-Factor! (No, it's not Wolverine - sigh.)The series has been collected in the following paperbacks:X-Factor: The Longest Night - (#1-6)X-Factor: Life And Death Matters - (#7-12)X-Factor: Many Lives Of Madrox - (#13-17)X-Factor: Heart Of Ice - (#18-24)Messiah Complex - (#25-27)X-Factor: The Only Game In Town - (#28-32)X-Factor: Secret Invasion - (#33-38)X-Factor: Time And A Half - (#39-45)X-Factor: Overtime - (#46-50)X-Factor: Invisible Woman Has Vanished - (#200-203)X-Factor: Second Coming - (#204-206)X-Factor: Happenings In Vegas - (#207-212)X-Factor: Scar Tissue - (#213-219)X-Factor: Hard Labor - (#220-224)Super Unnatural (#224.1, #225-228)They Keep Killing Madrox (#229-232)