Does this help (from bookseller information)
F - fine
Almost as new. No major blemishes but the book has signs of being previously owned. The page edges will be clean, the contents sound, no major faults and any minor faults will be specified.
Yes I accept that F can be an abbreviation for Fine but it is pretty obscure. The setter also used S for Society and C for College in the same puzzle. I am sure that these are all used somewhere if you look hard enough but I feel they make very weak and not very satisfactory clues.