The Grave's A Fine And Private Place by Alan Bradley

In this captivating mystery, the young and astute amateur sleuth, Flavia de Luce, finds herself embroiled in yet another thrilling investigation while on a boating trip with her family in the English countryside. When a dead body unexpectedly surfaces in the river, Flavia's curiosity and knack for chemistry lead her to uncover a web of secrets and deceit hidden within the quaint village. As she delves deeper into the mystery, Flavia must navigate through a series of intriguing clues, eccentric characters, and unexpected twists, all while grappling with her own personal challenges and the complexities of growing up.