Yom Killer by Ilene Schneider (Rabbi Aviva Cohen Mystery #3)
Yes, Rabbi Aviva Cohen is back, and she is just as feisty as ever. This time, when her mother lands in the hospital in a chemically induced coma after a fall in her assisted living facility, something doesn't seem quite right. However, until her mother wakes up, she's going to have a hard time figuring out what's really going on. It doesn't help that her straight-laced sister and her ex-husband the cop need to keep her out of harm's way in the process. Worse, she has only the few days between the Jewish New Year and the holiest day in Judaism - Yom Kippur - to get it all done before she has to be back on her pulpit.