As the Xavier Academy reels from Exodus's attack and the Marauders' true goals emerge, As Sinister's new team of Marauders, led by Gambit, seek out the Books Of Destiny, the X-Men make their play to protect this diary of things to come! The X-Men finally find themselves in a position to take the offensive. But as Cannonball and Iceman, who've already survived the arduous first confrontation with their rejuvenated enemies, must now walk into a trap they may not survive...or the X-Men will fail! FEATURING ENDANGERED SPECIES Chapter 13 Beast’s alliance with Dark Beast is put to the test as scientific inquiry turns into cold-blooded murder!