Viejo and the Lost Ranger — Cliff Hudgins

... a deep dark hole where you lose the sense of sight, touch, and direction. Even the things you once trusted are now just out of reach. Lee Brannan falls into such a hole, but one of his mind. When you can't remember who you are, the road back to reality is fraught with fear. What will he find on the other side and even worse, will he like who he is?