I picked up the 3 books in 1 collection (Football Factory, Headhunters, England Away) by John King a few years back and have got to say it is 1st class.
I know a few ex-hoolies and they say it is the perfect insight into what happens before and after a game, whether it be home or away. I dont know if its changed days or we, the public dont see it going on, I have been to Stamford Bridge on many ocassions, including the time period ranging from The Football Factory to present and have never saw any violence firsthand that is mentioned, although I have been assured many times that it does exist, just not as publicised as it was back in the 80's.
It is a cracking read and I recommend the other John King books, even if you dont have an interest in the subject, or even support Chelsea or England, it is a rivetting read from start to finish. The tales might depict 'bad men', but you feel you can relate to them, they have morals and scruples and a gentlemens code, just on a different level but still the same.
Go on have read, you will be hooked.