Relentless Protector by Colleen Thompson

Former army ranger Cole Sawyer reacts on instinct when he sees beautiful young widow Lisa Meador pull a gun at the bank. He foils the robbery, but when Lisa screams as the real robbers take off with her son, he realises that things aren’t what they seem. Driven by a painful secret, Cole makes the split-second decision to join forces with Lisa and trail the criminals across Texas.

Haunted by his failure to save Lisa’s husband in Afghanistan, Cole is determined to help her rescue her son. But he’s even more determined not to give in to his growing attraction to her. As they untangle clues and face the potentially devastating loss of their quarry, they soon realise that the kidnappers’ motives run deeper — and darker — than they ever expected...