F. Paul Wilson, The Dark at the End Tor (2011) ISBN: 978-0-7653-2283-8 Score: 2
Fifteenth and final Repairman Jack novel, in which Jack blows stuff up good (but not good enough). He makes a final appearance in Nightworld, a heavily revised version of which will be published next year.
F. Paul Wilson, Ground Zero Tor (2009) ISBN: 978-0-7653-2281-4 Score: 2.5
The 13th Repairman Jack novel (not counting the prequel[s]) the Author's Note calls this the "pen-penultimate" novel in the series (not counting Nightworld)
F. Paul Wilson, Bloodline Forge (2007) ISBN: 0-7653-1706-0 Score: 2
Eleventh Repairman Jack novel, about genetic engineering the old fashioned way. The ending is such that the next book could be a direct sequel, but doesn't have to be.
F. Paul Wilson, Harbingers Forge (2006) ISBN: 0-765-31276-X Score: 2
Tenth Repairman Jack novel, in which he learns more about the factions in the overall conflict and how they operate. Meanwhile, his life continues its downward spiral.
F. Paul Wilson, Sibs Dark Harvest (1991) ISBN: 0-913165-61-1 Score: 2
Stand alone (I believe) supernatural horror novel involving multiple personalities and sex. It's in the same setting as the Repairman Jack books (Julio's Bar is mentioned), but not otherwise connected.