"Sweetness at the Bottom of the Pie" by Alan Bradley
A really fun mystery that has lots of British atmosphere even though Bradley was born in Toronto and lives in Kelowna. The protagonist is eleven-year-old Flavia de Luce, an aspiring chemist with a passion for poison. Sounds like it might be for kids but enjoyable for everyone and doesn't have gratuitous sex and violence that so many mystery writers think is de rigueur.