Just recommending this - it was a good read from a chemistry point of view and a detection of murder. Not too violent.
if anyone is looking for a chemistry/ murder Christmas book with a different slant
www.amazon.co.uk/Taste-Poison-Eleven-substances-killers/dp/0008484589/ref=mp_s_a_1_5?crid=1PQ9N0FFWXBCY&keywords=poison+book&qid=1671477230&sprefix=poison+book%2Caps%2C101&sr=8-5