Guardian Angel (Harlequin Intrigue Series)

Who was the mysterious guardian angel? He'd succeeded where the FBI had failed, rescuing countless kidnapped children and bringing them to safety. His closely held hidden identity--as reclusive Nathan Tyler--was the only thing safeguarding his most private secrets. And they were about to go public....Colby agent Anne Martin had a serial kidnapper on her hands and no viable leads. Except the Guardian Angel. Undisclosed liaisons with the vigilante weren't safe. The man was no saint, but neither was she. And breaking all the rules was only the first step they'd take together....