The blurb, as requested:
Like many children, Calvin Zabo was fascinated by the tale of Dr. Jekyll and Mr. Hyde; unlike the others, though, he believed it to be true. Zabo dedicated his life to discovering the formula that would allow him to unleash the true man inside: powerful, invincible, fearless, and free from the constraints of 'civil' behavior. Now, as Mister Hyde, he is known as one of the most unrepentant and dangerous criminals at large. Hyde possesses a horrible strength of limb, a seemingly indomitable will, and tremendous resistance to injury.