Tempting the Darkness - Darkness, #5

For twenty long years, Cooper Hawthorne has kept the brightest light in his bleak existence a deeply hidden secret. All this time, his beloved Gabriella has slept safely in cryogenic stasis, awaiting the day he finds a cure for her terminal cancer. As love blooms amidst the Darkness, and still no cure in sight, loneliness drives Cooper to drastic measures. He awakens Gabriella and breaks his last promise to her-by turning her into a vampire. Gabriella's sense of betrayal weighs heavily on her attempts to deal with what Cooper has done to her.
Pushing him away, she turns to his friends for support-and finds she isn't the only one hurt by his actions. Cooper fights the temptation to use his powers to wipe her mind of the damning memories. But, when he comes face to face with the monster that created him, he knows what he must do.