I pulled this off my shelves last night to confirm that the relationship between the Pakistani ISI (Interservices-Intelligence) and the Taliban predates 9/11/01 obviously. p 565 In September 2001 the ISI "was determined to oppose any effort to foment rebellion against Mullah Omar from Pakistani soil."

So the Wiki-Leaks release over the week-end of so-called "secret" documents about the US involvement in Afghanistan mostly confirms what was already public knowledge. (I am writing on July 27, 2010)

In many ways Coll's book tells it all. If you read it nothing in the news about Afghanistan today will surprise you. And it certainly gives an excellent background to the 9/11 attacks. It's long but well written and thorough. At the time Coll was a managing editor for the Washington Post.