Brother Jonathan.

'''Kilian, Crawford. Brother Jonathan.''' New York: Ace/Berkley, 1985.

Cyberpunk novel with a standard super-hacker protagonist and supercorporation setting. A retarded person receives an implant intended to restore normal functioning. The implant instead bestows greater than normal faculties, including the ability to interface with the net. Rev. W. D. Stevens, FR #80 (June 1985): 27, source for this entry.