You know, I'd rather read Sinclair to be honest. His stuff is practical and his models are robust/uses models in a robust way. By "professionals" do you mean those guys who work for big banks, never risk their own money and juggle a massively overleveraged portfolio on the basis of a wonky model that disintegrates with the slightest change of correlations? If yes, Taleb is the perfect read for them...when they blow up, they just look for another job. I trade my own money and prefer Filthy.