Impending strike : an elite guardians novel

"Elite Guardian Charlie Lee knows that there is no future with the woman he loves--fellow Guardian Lizzie Tremaine. And he gets it. Lizzie's a single mom focused on protecting her daughter, and Charlie's got his own baggage anyway. It's easier, and safer, to keep things the way they are. Then, the unthinkable happens. While Charlie is undercover, he's seriously injured...and his memory of the past four years is gone. But maybe it's the fresh star...