The Teach Me series starts off with the story of Raine and Mac, the most unlikely of best friends... Taken from his parents and bounced from one foster home to the next, former Navy SEAL turned math teacher, Callum "Mac" Mackenzie had a rough childhood. The only time he's let himself get attached to anyone has been with his military "brothers." He's convinced he doesn't know how to love and certainly doesn't "do" relationships. He's spent fourteen...