A patron turned me onto a new site that is to die for, so to speak. Stop, You're Killing Me! http://www.stopyourekillingme.com/index.html is a website dedicated to readers of detective, mystery, spy and thriller novels. The site indexed over 3,400 authors and over 38,000 titles and series.
You can check out their What's New page to find listings of new authors and series. They also follow forthcoming releases in hardcover, paperback, large print and audiobooks.