British publisher that went into liquidation November 1954 after publishing over 100 titles. They had also tried a magazine called "Suspense Stories" with issues in July, September and November 1954. Some books have "Curtis Books" on the cover but this is currently used in ISFDB by a US publisher.
Most books entered now: prices taken from covers visible Spectre Library, which has an almost complete set. Most Cover Artists could be added from there too if you can decipher the surnames. (Ray Theobald mostly added already.)