Patricia Wentworth 
Vanishing Point [EPUB ebook] 

Nothing much ever seemed to happen in the sleepy village of Hazel Green apart from the occasional tea-party, spiced with local gossip. Until Maggie Bell went out one evening for a breath of fresh air and never came back. Could Maggie’s disappearance be linked to security leaks at the nearby Air Ministry? Or is a sinister scheme being hatched closer to home? Miss Silver is called in to solve the mystery just as a second person goes missing …