"As Chimney Sweepers Come to Dust" is a mystery novel written by Alan Bradley. It is the seventh book in his Flavia de Luce series, featuring the young sleuth Flavia de Luce. The series is set in the 1950s English countryside and follows Flavia, an eleven-year-old girl with a passion for chemistry and solving mysteries. In this installment, Flavia finds herself on a journey to Canada after being expelled from her boarding school in England. She travels to Miss Bodycote's Female Academy, a prestigious boarding school located in Toronto, which her mother once attended. However, upon her arrival, Flavia discovers that the school is hiding dark secrets, including the suspicious deaths of several students. As Flavia delves into the mysteries surrounding the academy, she encounters a cast of eccentric characters and uses her sharp wit and scientific knowledge to uncover the truth behind the deaths. Along the way, she faces danger and deception but remains determined to crack the case. The title of the book, "As Chimney Sweepers Come to Dust," is taken from William Shakespeare's play "Cymbeline" and reflects themes of mortality and the passage of time, which resonate throughout the novel. Overall, the book offers a captivating blend of mystery, humor, and historical detail, making it a compelling read for fans of the Flavia de Luce series.