Agatha Raisin And The Terrible Tourist by M.C. Beaton

A sharp-witted, retired PR consultant turned amateur sleuth finds her peaceful Cotswold village stirred into scandal when a brash tourist arrives, alienating residents and soon turning up dead; determined to satisfy her curiosity and protect the community, she navigates local rivalries, romantic entanglements and comic misunderstandings to unmask the killer.

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