Dreamwalker - The North Coast Bloodlines, #9

After a traumatic event in his childhood, Jeremy Dunham spends eleven years in Sycamore Acres psychiatric institution with no memory of that fateful night. He remains in the hospital even though he is now free to leave, because during his time there he has developed an extraordinary gift. he can enter the dreams of others. He calls it Dreamwalking. When he does decide to leave Sycamore Acres, he finds the outside world a strange and confusing place, but he also discovers facets of his talent that he never knew existed.
His ability gives him great power and forces in the government have plans for him. As Jeremy enters the dreamworlds of those he tries to help, he soon finds that even the most innocent mind can conjure up monsters of incredible ferocity and fury from the deepest, darkest corners of the human psyche, and give them life. Without the restraints of the physical world anything is possible, and anything can happen.