Strong Poison, Murder Must Advertise, and The Nine Tailors - Dorothy L. Sayers 1936 - Victor Gollancz Limited, London - Early Printing. 9th, 8th, & 16th impressions Impression. Three early printings of these Sayers highlights. Obtaining a first edition set of these three titles in dust jackets would require all the literary detective skills combined in this catalogue, far greater independent wealth than Lord Peter Wimsey, and possessing them may well end up being motive for, well, Bloody Murder!

Alternatively, here we have a scarce bright set of the early ‘Cheap Edition’ in their wonderful and delicate Gollancz dust jackets.
  The detective fiction of Dorothy L. Sayers (1893-1957) ‘is among the classics of the genre, being outstanding for it’s well researched backgrounds, distinguished style, observant characterisation, and ingenious plotting, and for its amateur detective Lord Peter Wimsey.

Not to forget that Dorothy Sayers was also extremely influential in the advertising world until her books became financially successful. One example - the Guinness Toucan and her jingle “If he can say as you can, Guinness is good for you, How grand to be a Toucan, Just think what Toucan do”.
A good friend of C. S. Lewis and several of the inklings.’ [OCEL]

Strong Poison’ was first published in 1930, ‘Murder Must Advertise’ was first published in 1933, and ‘The Nine Tailors’ was first published in 1934.

Reference: Cooper & Pike,
Detective Fiction 271. Colleen Gilbert, A bibliography of the works of Dorothy L. Sayers A3. Haycraft, Murder for Pleasure 136.

Octavo (books size 19 x 13 cm) pp. [2] 288; [2] 352; [2] 237. ‘
Strong Poison’ and ‘Murder Must Advertise’ in publisher's red cloth, spines lettered in black, dust jackets priced 2/6 net to spines and front panels; ‘The Nine Tailors’ in publisher's blue cloth, spine lettered in gilt. Dust jacket priced 4/6 net to spine and front panel.
  Condition: ‘Strong Poison’ very good, spotting to foredge and toning to pages, upper edge soiled, in very good dust jacket, toning to spine, light wear to corners and spine ends, closed tear to head of spine; ‘Murder Must Advertise’ near fine, spotting to foredge, in very good dust jacket, toning to spine, minor wear to edges and spine ends, bleed through to lower edge of rear panel; ‘The Nine Tailors’ Near fine, some occasional spotting, in near fine dust jacket, minor toning to spine, and some light spotting to rear panel.   Ref: 109368   Price: HK$ 3,500