This was an okay reread, but nothing special. The reluctant sleuth, Charlie, finds herself in the position of needing to clear her biologist mother of murder charges, although her mother not only hasn't forgiven her for getting pregnant at 16 (about 16 years earlier!) but has annoyed everyone around her into thinking her a likely killer.
I had a few bones to pick--things that really seemed problematic despite not impeding the story. First off, the title and various exchanges by the characters indicate that Charlie's mother could be unstable due to menopause, and Charlie asks her several times if she's stopped taking her hormones. While people experience menopause in a variety of ways (it makes some people more disagreeable), Edwina is shown as someone who surely must be done with menopause. The people who are working with her are stunned to hear that she's about 57 because they perceive her as being decades older. Most women go through menopause around 50 and even when the process is complete, it takes most well-nourished, healthy women today (even those not taking hormone replacements) years more to look much different than they did before. Menopause does not appear to be Edwina's problem, but we never learn what actually has made her bitchier than before (so that Charlie thinks she's had a personality change) or look like a crone instead of a middle-aged biology professor.
Similarly, all throughout the book, wild animals behave bizarrely, causing everyone to wonder why, whether their theory involves pollutants or UFOs. This is never resolved.
These things irked me somewhat as I read but irk me more now as they were just left hanging. I suppose they may be answered in a subsequent book, but I'm not feeling inclined to find out.