These are currently free, by two authors I highly recommend:
Ronald Malfi, The Ascent (listed as Thriller Suspense, but the author usually writes horror)
http://www.amazon.com/The-Ascent-Sur...s=ronald+malfi
Gord Rollo, Valley of the Scarecrow
http://www.amazon.com/Valley-of-the-...rds=gord+rollo