That book does not imply direct knowing or help..hold on let me explain..The Afghan fighters would not knowingly accept US help to overthrow Soviets.. SO Paki

That book does not imply direct knowing or help..hold on let me explain..The Afghan fighters would not knowingly accept US help to overthrow Soviets.. SO Pakistan ISA brokered US help by accepting US weapons and training and passing those weapons and training onto Afghan freedom fighters.. The source of the US help was the CIA.. So there was no direct knowledge in the sense that Osama did not know any CIA officers to contact, etc..but yes an indirect linkage of stuff yes.. BTW, why Pakistan? When Pakistan got the nuke bomb US policy makers reasoned that it might be helpful to support and help Pakistan to prevent use of the nuke bombs they had and those weapons falling into hands of someone else other than Pakistan..Pakistan's nuke bombs indirect result of China's political help to offset India ambitions.