Remember Home by Ginny Sterling

Dear John…
When Lily Hogan’s fourth-grade class writes letters to the military stationed in Afghanistan, she takes up her own pen, writing to an unknown soldier.
John Griffin and his bomb detection dog, Radar, spend their days in Afghanistan sniffing out explosives, searching the hills for insurgents, and leading his team… until an unexpected letter arrives.

Could a simple correspondence with a perfect stranger bring a fresh start to a life and love John never expected?