Why the site says this is unavailable is anyone's guess: it's not. And the fact that it's not listed under the author's name is another annoyance. However...
Saw this in the shop I work at. Never heard of him before. Read the back, read the author biog. "...quietly drank himself to death"... sounded like my kind of writer. I bought it. Three novels in one, too: very nice. Researched him after i bought it, found his style was said to be "unusual". Oh dear... trepidation ensued. I picked it up nervously, and started the first novel, Nothing, an account of a meddling mother and father's (friends, not married), influence and observance of their own children's lives, their loves. And it was brilliant. Green's style is completely unique; I've read nothing like this dialogue-heavy, play-like narrative before, with it's quirky, at-odds descriptions that are powerful for their oddity. I loved it. I was so glad to have picked this volume up. Green's perception of his characters as they interact with one another in a series of one-on-one situations is wonderful. Gradually a picture swarms up of the four lives concerned, and equally important to what Green shows you is what Green doesn't, what he has occur of-screen, as it were.
I loved reading Nothing. If you consider yourself widely read, and to have an appreciation of classic literature, you simply must give Green a go. A relatively forgotten novelist, it seems, but on the evidence of Nothing, a remarkably fine one. I review this book only having read the first of the three novels in it, but that alone was worth the price and the promise of two more. I look forward to reading the following efforts very much. Green is a quiet, completely unique gem in the crown of mid 20th century British literature. Superb!