"Amos Decker witnesses a murder just outside FBI headquarters. A man shoots a woman execution-style on a crowded sidewalk, then turns the gun on himself. Even with Decker's extraordinary powers of observation and deduction, the killing is baffling. Decker and his team can find absolutely no connection between the shooter--a family man with a successful consulting business--and his victim, a schoolteacher. Nor is there a hint of any possible motive...

When Amos Decker and his FBI colleague Alex Jamison are called to London, North Dakota, they instantly sense that the thriving fracking town is ripe for trouble. The promise of a second gold rush has attracted an onslaught of newcomers all hoping for a windfall, and the community is growing faster than houses can be built. The sudden boom has also brought a slew of problems with it, including drugs, property crimes, prostitution -- and now murder. Decker...