The Purloined Puzzle by Darnell Hall, 389 pages

Amateur sleuth and crossword impresario Cora Felton is asked to solve a puzzle, only to find that it’s been stolen—and a murder weapon has been left in its place.
When the obnoxious sixteen-year-old Peggy Dawson asks Cora Felton to solve a puzzle for her, Cora is delighted to find that the puzzle has been stolen. She is less delighted, however, when a blood-stained knife is found in its place.

Soon a body is discovered in the middle of Main Street, and Cora has a murder investigation on her hands. It does not help matters when she hears that her least favorite ex-husband, Melvin, is in town pulling a real estate scam, particularly when she discovers that Melvin may have purchased the knife. Now it’s up to the Puzzle Lady to figure out what really happened.

The Kenken Killings by Parnell Hall, 326 pages

This is the newest entry in the Puzzle Lady series. Cora Felton's ex-husband Melvin (one of many) had conspired to trick Cora into not getting any more alimony. During the course of the trial, dead bodies start to pile up and it looks like Melvin is guilty. Cora works to prove his innocence while denying that she still has feelings for the cheating scumbag.
This series is always a lot of fun, with great crossword puzzles. This book included Kenken puzzles which are evidently like Suduko but slightly different. I'm incapable of solving Suduko and Kenken both, but love crossword puzzles. Luckily, the book supplies the solved puzzles.