Anthony Gilbert 
Die in the Dark [EPUB ebook] 

A seemingly-innocent advert; a missing widow. And it’s the detective who’s in the most danger… Classic crime from one of the greats of the Detection Club Detective Arthur Crook is browsing the newspaper on the morning of 14 April 1947, when an advertisement jumps out at him. 'Rest and Refreshment: to a lady seeking the above and able to pay for it, is offered a unique opportunity for complete seclusion in a delightful country house’Disastrously, Mrs Emily Watson has read the same ad, and soon Crook becomes embroiled in the disappearance of a rich widow preyed upon by her unscrupulous nephew. And, for once, the super sleuth almost comes a cropper . . . 'The ebullient Crook at his boisterous best’ Country Life