Just started this. The original was one of my favourite books of his, this one is nearly twice as long. He's also returned from the dark side and published it himself.
Ebooks
http://www.amazon.co.uk/Trust-ebook/dp/B008NYD00C
http://www.amazon.com/Trust-ebook/dp/B008NYD00C
Realbooks
http://www.infectedbooks.co.uk/limited.htm
http://www.infectedbooks.co.uk/Signed.htm