A Shot in the Dark was published by Simon & Schuster in 1952 as a hardcover. The edition that caught my eye is a mass market published by Award Books in 1965. It is a seemingly simple cover with only a small splash of illustration, but the overall design—the black background scratching its way into a blue border—works very well. The "Now Only" sticker, which I don't dare remove, adds a little something, but mostly an enviable price. The artist: Unknown (to me).
The opening sentence:
“It was stupid to go on needling the customs officer at the Havana airport, but Johnny Edwards had been doing stupid things all his life and he didn’t feel like reforming now.”