The Inspector and Silence by Hakan Nesser

Chief Inspector Van Veeteren is asked to help out in the town of Sorbinowo while their chief of police is on vacation. Sergeant Kluuge has called Van Veeteren because he's received calls that a girl has disappeared at the Pure Life Camp. Pure Life is a religious sect headed by Oscar Yellinek and the camp has about twelve girls staying there over the summer. Van Veeteren, Kluuge, and their colleagues, however, are extremely frustrated because Yellinek and his followers, all female, are very tight-lipped about everything. When the body of a young girl is found murdered, the police wonder how they will unravel what exactly happened. The Inspector and Silence is the latest book to be published in the Van Veeteren series and, frankly, I enjoyed the previous ones a bit more.