It's nearing the end of WWII, and Michael Harsh has been working for the government on a secret project for years. Finally he is ready to hand over the formula. But the next morning he is dead. It looks like suicide. Only Miss Silver knows it's murder.
Patricia Wentworth was born in Uttarakhand, India but as a young girl moved to London to study at Blackheath High School for Girls. After writing several romances she turned her hand to crime fiction. She wrote dozens of bestselling mysteries before her death in 1961, and is recognised as one of the mistresses of classic crime fiction.