I picked "A Choice of Nightmares" off the thriller shelf based
purely on the cover. Oddly, the jacket had no review-blurbs,
but a few decent quotes from the book instead. It was
published in 1991, and Google reports he's only just this year
released his second, "The Long Fall". (The jacket-bio says
his 2nd will be "The Work of Hands" which perhaps languishes
somewhere?)
Before reading Kostoff I would have placed Stone on a plateau
by himself, but Kostoff catches his moral seriousness well
enough to gauge the distances involved. Kostoff adds some
Pynchonian wit as well, and has a daring way with metaphors.
I can only guess that "Nightmares" was neglected because the
last half is somewhat rough going, as the coke-smugglers
construct byzantine layers of mutual betrayal. (As with
some Stone, the ending is also a bit of a letdown.)
But it's a shame he hasn't enjoyed more encouragement...