I just finished Crisscross and The Haunted Air. Both books were Repairman Jack stories by F. Paul Wilson.

Repairman Jack is a defiantly libertarian NYC resident who lives off the grid. He has no official identity, avoids his family, pays no taxes, doesn't vote, owns nothing in his own name and lives as invisibly as possible.

Jack makes his living "fixing" situations for people when police or other officialdom can't help. Jack doesn't start fights, but he's not averse to finishing them-terminally. Getting on his bad side is not a good idea. Jack despises bullies but also despises people that don't stand up for themselves. His primary motivation for any job is money and the sheer joy of outsmarting a criminal or other dangerous person.

Over time more and more of his fix-its start to involve phenomena that can't be rationally explained. F. Paul Wilson ultimately ties in Jack to some of his other horror series.

In Crisscross Jack tries to help a nun who's being blackmailed and also help another woman rescue her son from a fictionalized version of the Scientologist church. This book was quite violent.

In The Haunted Air Jack is brought in to protect two psychics from other rivals enraged at losing clients. But then he finds there's more going on than phony tricksters.

Both books were very enjoyable. Wilson writes in a cliffhanging style that is quite reminiscent of a updated version of some of the older pulps.