This is weird - people either love this thing or hate it.
Yes, there were stylistic incongruities, and there were a few typos in the copy I downloaded, but...
The plot was excellent, for what it was, which is a story written to entertain. This is not Great Literature, and I am sure Mr. Dakan had no intention of it being read as such. This is escapist entertainment, to be sure, and should be taken on its own merits. Sure, the protagonist is no James Bond - but then he's not meant to be. He rang true to me as someone pushed into a situation that he couldn't understand.
For those who like complex plots on the verge of plausibility, techno background and a look at Silicon Valley's unique subculture, Geek Mafia is for you. For those who want an exquisite psychological portrait of 21st century angst, go somewhere else.