Robert McCammon has a few books on sale at Amazon:
Swan Song is $1.99. An epic port-apocalyptic horror novel that's almost impossible not to compare to The Stand, even if the comparison is unfair.
Stinger is $1.99. An alien bounty hunter arrives in a desolate West Texas desert town.
Boy's Life is $1.99. Not a horror novel. More a novel of childhood similar to Ray Bradbury or Stephen King. One of his most highly regarded novels.
The Wolf's Hour is $2.81. A werewolf SAS officer in WWII. I haven't read it yet, but have been told repeatedly that I am wrong for not having done so.