Sinfandel by Gina Cresse. Wine, murder, lying cheating ex...
Not surprisingly the punny title and wine theme caught my eye
and the blurb sounded decent, so I clicked the author's name and got nada on the Amazon site. When I did a google search to my astonishment up popped a fantastic fiction page for this author. Apparently she had a prior mystery series published in hardcover by Avalon. I backtracked and sure enough, her 5 hardcovers show up under the books category at Amazon.