What happened to Amy?

Sinopse

Joyce Farrell loved her summer job at Pinole Vista, on the Monterey Peninsula. What could be better than getting paid for reading and typing suspense novels as they were written? Then she found herself in the midst of a more thrilling mystery than any her employer wrote. Just what had happened to Amy, who had held the job before her, and had vanished suddenly leaving clothes, books and other possessions behind? It was in her search through Amy's property that Joyce found the clues: the little silver bangle and the letter that began "Darling", but had no signature ...