Former library book. Wear from use. Was most likely poorly bound in the first place as pages 7 through 18 are detached and pages 235 through 246 are loose from bottom halfway up and there is a break in binding between 246 and 247. This is still a readable copy.....if i didn't have a duplicate on my shelf, i would probably still keep one in this poor condition. No pages ste completely missing. Rather than discard the book, I am selling it cheap as mrrely a readable copy.