Mysterious Ways by Shirley Penick

An arsonist is loose in their town. Two buildings burned. They have to find him. Stop him.
Nicole Roman is on a quest to track down her brother. She believes he’s reverted back to his pyromaniac tendencies and she is determined to find him, before someone gets hurt. It’s been eight months with no success. Deciding the town’s pastor could give her some confidential guidance, she goes to the church.
Pastor Scott Davidson is willing and able to give her the advice and support she needs. But he will have to reign in his attraction to the delightful lady. She needs assistance, not some guy lusting after her.
Nicole decides to trust the hunky pastor-slash-volunteer firefighter. Scott is her best chance to find her brother and get him the help he needs.
Scott promises to help, but his reason is very different than Nicole’s. This fire bug needs to be found and stopped at all costs. Even the chance for a relationship with the lovely Nicole.