Mystique, book 3: Unatural
Sean McKeever2004

Mystique is a shapeshifter with dreaded terrorist past.
Charles Xavier, the mentor of the X-Men, took her under his wing and offered his protection in exchange of her services of super-spy.
During one of his missions, Mystique is contacted by Shepard, emissary of a mysterious man known as the only name of the Quiet Man.
Shepard promises to Mystique to win her freedom if she agreed to play the dual agents and betraying Xavier.
She reflects the proposal, but as always, her true intentions are known only by herself ...
On the ground, she is assisted by Shortpack, high telepath twenty centimeters.
This tiny mutant is loyal to Xavier, but he might hide some personal little secrets ...
(Collects MYSTIQUE #14-18)