Gideon Sams' "The Punk" is utter rubbish, but quite enjoyable - it's written like a school story (he was only 12 or something) and there's a hilarious love scene where part of the build-up is "she rolled down her sexy dungarees" or something. It later formed the plot of an absolutely atrocious 80s film about a 'punk' who falls in love with a spoilt Belsize Park girl and stabs her implausible biker boyfriend. Actually, don't bother with either, the book's funnier but it'll take you all of 3 minutes to read.
I thought "Human Punk" was tedious as fuck, probably autobiographical.
As for Richard Allen, "Punk Rock" is brilliant, mostly cos 1) Allen hasn't a clue about punk and the names he comes up with for punk stars / songs is so clueless it's funny 2) it's the best pulp novel written about corrupt music hacks EVER - it also established the brilliant fictional publication 'SPINS' which was still going when Stewart Home started writing 3) there's a line of anti-punk moralism running through it, which again is really funny - it's clear Allen disliked punk and was forced to write about it to cash in on the craze 4) it contains the post-coital line "Did you choke Linda Lovelace?" 5) oh...just get it, it's brilliant.
But the best Allen book was "Boot Boys", by about 1,000 light years, and seriously rivals Stewart Home for craziness. Home-wise, I still love "Red London" and "Slow Death", but for me "New Britain" cracked it.
There was another book with punks and skinheads I read at school, but I can't remember what it was called, except some punk girl gets her safety pin ripped through her cheek and a skinhead bully dies at the end.
Some of Martin Millar's stuff's OK, though some people hate him.