This is the 4th book in the Mellingham series, a cozy police proceedural set in a small MA town. I love all the books in this series and wish Susan Oleksiw would write more of them. It is not necessary to read earlier books to enjoy any of them.
This one is about a 25th class reunion of the class of '69. The organizer has a scandal that shadows her life and is afraid of exposure. I recommend this book and any other by this writer.