The Garden Girls by Jessica R. Patch

On a remote Outer Banks island, a serial killer collects his prized specimens. And to stop him, an FBI agent must confront his own twisted past.

FBI agent Tiberius Granger has seen his share of darkness. But a new case sets him on edge. It’s not just the macabre way both victims—found posed in front of lighthouses—are tattooed with flowers that match their names. There’s also the unsettling connection to the woman Ty once loved and to the shadowy cult they both risked everything to escape.
Bexley Hemmingway’s sister has gone missing, and she’ll do anything to find her—including teaming up with Ty. That may prove a mistake, and not just because Ty doesn’t know he’s the father of her teenaged son. It seems the killer is taunting Ty, drawing everyone close to him into deeper danger.
As the slashing winds and rain of a deadly hurricane approach the coast of North Carolina, the search leads Ty and Bex to an island that hides a grisly secret. But in his quest for the truth, Ty has ignored the fact that this time, he’s not just the hunter. Every move has been orchestrated by a killer into a perfect storm of terror, and they will need all their skills to survive…