Shepherd O'Conner (By the Light of the Moon)

Shepherd "Shep" O'Conner is a major character in the thriller novel By the Light of the Moon by Dean Koontz.

Autism
Shepherd is described as such: "He's been diagnosed autistic, also high-functioning autistic. He's never violent, and sometimes he's highly communicative, so was once even diagnosed with Asperger syndrome."