Astonisher (Astonisher #8)

Things never seem to go the way Magnus wants them to, what with his former doctor turning out to be evil. Now is the time to be a real superhero and rescue the only person who's ever stayed by his side from Dr. Saperstein, who's trying his best to continue ruining Magnus's life. The climax of Magnus's story is drawing near, something he may or may not be ready to handle.