Mockingbird, Vol. 1 by Chelsea Cain

I Can Explain

Under mandatory S.H.I.E.L.D. health checkups after a life-saving cocktail of the Super-Soldier Serum and the Infinity Formula, Bobbi Morse starts experiencing strange symptoms that point to a hidden agenda. As routine visits spiral into a breadcrumb trail of covert clinics, dubious handlers, and meddling exes, she leverages sharp scientific insight and lethal field skills to unravel who’s tampering with her body and why. The investigation culminates in a high-stakes confrontation that lets her reclaim control on her own terms, delivering a fast, witty blend of spycraft, superhero action, and dark humor centered on a fiercely autonomous heroine.