Undercover Defender by Maggie K. Black

A child is in danger...and a man with no memories is his only hope.

Military Investigator Darius Ezra barely survives a deadly explosion while trying to warn detective Blake Murphy and her son about the threat against them. Despite amnesia clouding his mind, Darius is determined to help single mum Blake protect her child from the enemy that killed her husband. When her toddler, Bobby, is kidnapped, they must navigate the treacherous Canadian wilderness to save him and recover the confidential files that made them targets. Darius’s missing memories hold the key to their survival — but uncovering them could prove fatal...