A Step So Grave

This is the 13th book in the Dandy Gilver mystery series but the first that I have read. It takes place in the 30's and Dandy (female) is a P.I. who works cases with Alex. She is married with 2 sons, one of whom is marrying a woman several years older. The Gilver family travels to spend a weekend with the Dunnochs and meet the family of Mallory as well as the bride. While there, Mallory's mother is killed and thus the plot thickens. McPherson writes with a light and humorous touch. As the investigation ensues, everyone there at the time of the murder seems to have a reasonable alibi as well as knowing who the killer is. And each person offers up a different (and plausible) suspect. Needless to say, the murder is finally solved and it is a surprising end. Enjoy!