I was just wondering how many editions, published as paperbacks, were also published as hardbacks? This train of thought was brought on by having just got a hardback boxed copy of T27 "Red, White & Rose" from 1967. I know there was a hardback version of "The Dam Busters" from 1955 but not sure why, something to do with the film premiere perhaps? Why was X560 "Salt Is Leaving" also published in a hardback library edition in 1966 and not other titles? Why GP91 "Secrets Of Suez" from 1957 and "Born To Hunger"? Does anyone else have other examples apart from the numerous BYO copies?
