Mind Games — B.B. Griffith

Sophie West has a problem with her imaginary friend, Mo. Most girls have forgotten their imaginary friends by the age of thirteen, but Mo seems more and more real every day. The problem is, instead of playing hide and seek and tea party like they used to, now all Mo wants to play with is fire. Sophie's Mom, Dianne, doesn't know where to turn for help. Someone is starting fires in their exclusive Baltimore neighborhood, and she's terrified it might be Sophie. Desperate, she calls the only person she can think of with the discretion and experience she needs. Gordon Pope is still trying to get his fledgling child psychiatry practice off the ground. When he answers Dianne's call, he thinks he's simply taking on another troubled young patient. What he doesn't realize is that he's about to find out just how dangerous Mo's games really are.