My books were all covered in 1970s velvet and gold (Indian restaurant) style wallpaper. Girls at school with me were always really disappointed to discover that our actual walls were covered in magnolia woodchip! My mum had been given several files of wallpaper samples when a local shop closed down - more than enough to last all 5 of us all the way through school. My brother rebelled at one point and started covering his books in black bin liner instead.
Certainly we never knew the titles of our books because we never saw the covers. It was only in subjects like History, when we had a variety of different books, that we had to distinguish between one text book and another.
I particularly remember "Russia - A World History" because its author once broke into my hotel room, wearing unbelievably garish pyjamas, looking for boys.
I assume he eventually found them elsewhere because he never came back.