A damaged timeline. A friend erased from existence. Can a daring scientist reweave the threads of history and catch a psychopath?

Mars Lockporte's brilliance takes him down some reckless paths. When he returns from tampering with the timestream, the quantum physics major is horrified to discover that saving one buddy from murder has caused another to vanish. But everything gets put on hold when he's unceremoniously yanked to the wilds of 1970s Montana ... and the middle of a serial killer's burial ground.

Knowing one wrong step could cause a cascade of destruction, the bold genius flees to a ranger station and leads officials to the bodies of twenty slaughtered women and young girls. And with his track record for protecting the innocent looking grim, a guilt-ridden Mars struggles to fix the bloody mess before he's snapped back to the present.

Will he sacrifice the stability of the future to defeat a twisted murderer?

Twenty-One Kills is the nail-biting second book in the Leap Limit science fiction series. If you like big-hearted protagonists, experiments gone wild, and high-stakes adventures, then you'll love Janice Boekhoff's race against death.