All repeats, but in case you've missed them: I haven't read the Adler one, but have read & enjoyed the first two.
Last Dance in Redondo Beach, by Michael J. Katz.
backlist from roughly 1990, comedic mystery featuring a sportscaster and a down-on-his-luck PI friend, solving sports-industry murders. Stylistically similar to Roger Simon, Donald Westlake, etc.
Kill All the Lawyers, by Paul Levine. Another comedic mystery, part of the Solomon vs. Lord series. An unlikely pairing (both professionally and romantically) of a straight-laced lawyer with a risk-taking, convention-flouting, corner-cutting partner. Sharp banter between the 2 is the hallmark.
Blood Ties, by Warren Adler, direct from his website:
"At a family reunion, the Von Kassel family, who has been engaged in arms dealing for a hundred years, find themselves able to create the most destructive weapon on earth."
Part of his rotational give-away program. (This was free I think in early December--since I haven't visited lately, I'm not sure if it's stayed since then?)
While you're there, take a few minutes to read some of Adler's blog. Very perceptive comments on ebooks, the publishing industry, and laws and regulations affecting same.