Repairman Jack is a character caught in between another series that F. Paul Wilson created called the Adversary series.
A SciFi thing where two advanced extraterrestrial civilizations are fighting over the Earth.

One is evil and one is trying to stop the evil. Repairman Jack gets caught up in this, and the two series sort of merge.
He is a human with special talents/gifts, who helps people that law enforcement refuses to deal with. In his adventures he encounters this strife between the Otherness (evil) and The Ally (the one working against the Otherness).

The stories have some medicine in them, some action (which is unusual action I might add) and also the drama of Jack's dilemma and his own dark forces inside. It is very readable, and I guess pretty popular, and I fell across it in the hot picks section of the library last year. Fatal Error, is a chapter near the end of the series about taking down the internet! So I found it pretty good and went back to all the other books over the year.

I was lucky that our library had about 10 of the books. So by spring I was only buying the paperbacks on Ebay and Amazon used. I find F. Paul Wilson very readable...intelligent and compelling, in some way. Jack is a damaged soul and tries to help others get solutions to problems no one will help with. Sound familiar?