Simon’s Promise by Leanne Tyler

Jocelyn Lassiter is receiving death threats. Death threats connected to a bomb threat at the Evermore hotel, where she’s head of security, and to Simon Britton, military explosives expert, who used a similar bomb for training when she was an FBI agent.
Simon Britton is trying to get his life back together after he and his team were less than honorably discharged from the military after a CIA assignment went south. Getting the call from Jocelyn to help discover who is threatening her brings him right back into the fire. Someone is trying to frame him, but this time there’s more at stake than his reputation – Jocelyn’s life.

And his heart.
Can he work closely with her to diffuse the threats and discover who wants to destroy both of them?