Looks like you can get it from amazon.com rather than .co.ukhttp://www.amazon.com/gp/product/0811733394/ref=pd_sim_b_3/102-7939482-9130566?%5Fencoding=UTF8&v=glance&n=283155Around $31 including shipping.I interviewed the other author - Doug Hunter - for a short piece for Rock and Ice a few years ago. Interesting guy with unusual, Dawes-esque ideas about climbing. I'm sure the book will be a good read.
Is this article I've seen posted in a couple of places relevant?http://www.rockclimbing.com/articles/index.php?id=2140
Just received his book, which seems very useful and complements performance rock very well