The Devil's Backbone — Robert O. Greer

THREE GRAND, TWO SHIRTS. ONE DEVIL OF A TIME…
$3000 for Two Shirts. It seemed like a good deal at the time. All bail bondsman CJ Floyd had to do was mosey up the Colorado Diamond Breaks wilderness and bring back a skinny fireworks pusher named Bobby Two Shirts. But when CJ get his bail jumper he also acquires the most beautiful enemy man could ever hope for: Bobby's breast-baring, rifle-toting, long-legged twin sister, Celeste, who's now gunning for CJ Floyd with all her heart.

She's a killer CJ doesn't see coming. Because as soon as he gets back to Denver he's caught up in the mystery of the murder of a black rodeo star at the Greeley Stampede. Now CJ is following a trail paved with the best intentions to a place called the Devil's Backbone. And with a murderous beauty and a killer both waiting for him, it's going to take an angel to lead CJ back out alive…