Four years trapped in my mind palace

"Fourteen-year-old Aaron Greenburg is trapped in a vegetative state. He's awake and aware of everything around him--but the doctors don't realize it. After years of being left in a care facility and facing dwindling interest from his own family, Aaron begins to despair--until, that is, a new roommate arrives: Solomon, a crusty, eccentric jazz musician with dementia. When Aaron talks in his mind to stay sane, Solomon unexpectedly hears his thought...