Agatha Raison and a Spoonful of Poison

I just finished Agatha Raison and a Spoonful of Poison by M.C. Beaton. This is the newest book in the series. Agatha Raison lives in the Cotswolds and after retiring from an advertising career in London, she takes on investigative work. She now has a detective agency and solves all sorts of cases including missing persons to murders. In this book, she had to figure out who tainted the jams at the baking contest with LSD. Since two old ladies died after tasting the jams, she is after a murderer. The only bad part about this book is that the character is only in her early 50's but the author makes her seem ancient. A good cozy mystery overall!