I forgot to mention that the hardback covers are now blue also - matching the new-style paperbacks. Pink has gone.
My earliest hardbacks had loose covers but those disappeared in 1983 and the covers then matched the paperbacks which were all different colours.
Then in 1996 came the pink covers which have reigned ever since, though they did change the style slightly in 2008.
It's interesting to see the changes over the years.
