Marvel Astonishing X-Men Mystique Vol. 2 Tinker Tailor Mutant Spy (2004) Paperback Book

Mystique is a shape-shifting mutant and former terrorist, recruited by Professor Xavier of the X-Men to be a secret agent. Her current mission: to find and destroy a deadly new strain of smallpox...one that's spread telepathically Problem is, she's not the only mutant who wants to get her hands on this potentially apocalyptic bio-weapon.