"Amos Decker, the FBI consultant with a perfect memory, and Alex Jamison FBI. Return to solve a gruesome murder of a young woman named Irene Cramer, in a booming North Dakota oil fracking town. The promise of a second gold rush has attracted an onslaught of newcomers all hoping for a windfall, bringing with them problems, including drugs, property crimes, prostitution and now a gruesome murder."--Publisher description.

Series numeration from goodreads.com