Derren Brown is an English mentalist, illusionist, and author. He has produced several shows the stage and television and is the winner of two Laurence Olivier Awards for Best Entertainment. He has also written books for magicians as well as the general public.
It's astonishing to me that people are willing to pay extortionate amounts of money to access a copy of this book because it's out of print and he's popular. I consider myself a fan of Derren, but I'm glad I didn't find out about him until 2012- he seems like less of a pretentious little shit now than he apparently was when writing this book. It wavers between describing theory and practice, and is much more accomplished at the former. The 'practical' bits are not presented in a manner conducive to learning. Even though the theory was better presented, the tone affected in these passages is quite distasteful from time to time. Books on magic are hit and miss, and this is hardly the worst of the lot, but unfortunately due to Derren's success now, Pure Effect was built up to unattainable heights. Or rather, I just kinda thought it would be decent and it wasn't.
There are parts of this book that are hard to read for being awfully pretentious, sexist and immature. The magic/mentalism theory parts were more interesting to me than the effects. At its best, the theory came close to the kind of thing Eugene Burger and Robert Neale were doing in "Magic and Meaning" (I liked that book a lot more). Recently I've been reading books/essays and watching videos from a few contemporary young mentalists, and it was also interesting to see how this book seems to have influenced their approaches.