These are out of print now and 'apparently' Derren himself pulled 'Pure Effect' coz it gave too much away. They're going for like 70 quid EACH on eBay so I'm a bit suspicious as to whether this is the real deal, but I'll let you know as I say.
Absolute Magic has some routines but is more concerned with presentation and effect. I believe it has a good section on pick-pocketing (not that I need that - I'm a Manc

)
Pure Effect is, if the hype is to believed, a fantastic book on mentalist routines and reveals a lot about Derren's actual techniques.
I'm still a bit sceptical that I've got these 2 out-of-print books for almost half the price of one of them, but I've had an email receipt and all looks good so far. Here's hoping.....
Chris.