Invisible - Mary Kennedy - Bog

With Gray Wolf Security finally open for business, the seniors are ready to begin their new chapter. Visited by an old friend, they discover that kids are going missing in the Quarter. More specifically, three young girls that were being watched out for by generous waiters in one of the upscale restaurants. With no clues, and no one that will talk to the team, they have to go back to their roots and do what they do best. Dig up the details themselves. But everything is not what it seems. Children running around at all hours of the night, no clues as to where the missing have gone, and the constant use of one word that sends chills down their back. Invisible.