Bowen, Rhys. Royal Spyness mysteries #17

Thorndike Press large print mystery series.

"Georgie's new chef, Pierre, has arrived from Paris, it's time for Georgie to throw her first house party to show him off. The dinner party is a smashing success. Sir Mortimer Mordred--famous author of Gothic horror novels--is one of the guests. After the dinner, Sir Mortimer approaches Georgie and asks to borrow her new chef for his upcoming party, .and Georgie and Darcy, her husband, are invited! Just after the banquet several of the guests become sick. And one dies, apparently poisoned. But how could this be when they all ate the same meal? Georgie has to find the culprit to save her new chef and her own reputation!"--