The Disappearance — Amanda Stevens

To find her brother 

...they must first find a killer.

“I need you. Hurry!” It's the worrisome text from her brother Connor that brings criminal analyst Claire Tinsley to picturesque San Miguel, Texas. There, she's stunned to find her brother has vanished without a trace. Could he have murdered his employer and gone on the run? Claire refuses to believe it, and finds help searching for evidence from Ben Dornan, an undercover federal agent posing as a former cop. As they retrace Connor's steps, Claire becomes intrigued by yet distrustful of the attractive man she believes is a cop. But she's thoroughly shaken by a revelation that connects her to Connor and Ben…and puts a target on her back.  

From Harlequin Intrigue: Seek thrills. Solve crimes. Justice served.