Written by PETER DAVID Penciled by VALENTINE DELANDRO & MARCO SANTUCCI Cover by DAVID YARDIN Witness the most important event in the lives of Jaime Madrox and Siren-the birth of their baby! What will happen to X-Factor-and what will be the meaning for mutantkind? All we can guarantee are that the answers are not what you expect-but that's what makes it X-Factor! Don't miss what is sure to be one of the most talked-about books of 2009! Collecting X-FACTOR #39-45. 168 PGS./Rated T+