Mayan Gods in the Yucatan — M.L. Hamilton

Peyton and Marco have always led complicated lives, but now their cases are pulling them in different directions. After his surgery, Marco has a long road of rehabilitation ahead of him, but his precinct needs him to focus on the murder of a young serviceman who might have intimate ties to the mayor. Peyton wants to be there for him; however, when a DEA agent turns up missing, the Ghost Squad is called to the Yucatan to investigate. What they find there will embroil them in a drug war between two countries, where illicit activities are being bartered underground and the players are impossible to identify. However, as Peyton and her team soon learn, they are facing an adversary that will only be appeased in blood â€" the blood of humans sacrificed to an uneasy Mayan god.