Sisters Bee and Bel operate a tour company--To Be Tours--designed for the literate and adventurous traveler. Their current tour "Castles, Chianti, and Classics" includes a Tuscan cooking class, book discussions,and highlights of Italy for their quixotic group.  The sisters' impeccably planned trip is repeatedly derailed by one nasty participant. Patty manages to alienate, infuriate, and embarrass each of the guests in turn, and threatens to make the word "American" a new and potent profanity.  Patty seems determined to ruin not only the tour but the lives of other tour members.  After a series of frightening incidents, Patty is found dead.  With everyone secretly relieved she is silenced, Bel and Bee discretely unravel the mysteries concealed by their companions, each of whom has an excellent motive for murder. Often hilarious, always informative, Poison Patty has a surprise ending that will leave readers wanting more in this delightful new series.