Earl Derr Biggers 
Keeper of the Keys [EPUB ebook] 
A Charlie Chan Mystery

In the final installment of the classic series of mysteries featuring Charlie Chan of the Honolulu Police, we find the diminutive Chinese American detective in Lake Tahoe. His fame as a brilliant solver of the most perplexing murder cases has spread throughout the world and he has been summoned to investigate the matter of a long-missing child. But again, he finds himself embroiled in another murder inquiry; this time in the shooting death of a glamorous opera singer, which occured during a party Chan himself was present. He solves the case in his usual understated yet spectacular fashion.