Same here, I had it checked out from the library continuously for a couple of years and referred to it constantly. A terrific explanation of a super cool piece of work, full of insights. I later bought another ex-library copy that I still have.

That library was so good to me! (In Crook, County Durham in north-east England) As well as providing what was probably, if I'm really honest, the most fascinating technical book of my programming career, it also had a load of LP records I wouldn't have heard anywhere else - the Go-Betweens and Peter Murphy's "Deep" I remember particularly.