Here's one of the covers proposed for my new novel. (The generous quote from Tracy Kidder is slightly off, since the novel's not about Napa Valley, but there are certainly similarities with many valleys in California where great wine is made.) There will be other covers suggested, and I'm interested in readers' reactions.
The cover invokes "suspense." A bit sensual too. Paul Worsterberg
This is provocative but if it contains some humor, which I suspect it does, black might not be the best color for a cover. Bill Fontaine