Well my first set of paperbacks survived long enough to be ' lent' ( it tends to be a fairly permanent arrangement where she is concerned
) , to my god daughter after she saw the first film but they were already reinforced with aging sellotape and ROTK self destructed as she read it leaving her to kidnap her brother's one volume edition.
I then bought the film edition paperbacks and once again ROTK is the first casualty having lost the back cover. I think I do need hard backs....