Is It Ok to Buy a Book about Osama, Or Will I End Up Flagged by the Government?

So what's the deal with buying books about Osama these days? I've become very interested in the subject matter this week (obviously), but I can't help but envision myself checking out of the book store and being taken down commando style while some security guard yells SWARM, SWARM as the cashier gives me my change.  

Obviously I don't need that happening, so is there a proper way to do this without being flagged as some kind of nut job?  The Maestro suggested I use cash, but I never carry cash more than like $10 anymore, who does? That's for the commoners.  Maybe bring my old school ID so they think it's for academic purposes? That would get me in the clear I think.

Of course my other conundrum I don't think is as easily solvable. See, I pretty much only read on vacations, which means I do all my book shopping at the Hudson News stand in the airport.  I think I'm safe in assuming there is no way of getting around being randomly selected for for a "backroom" TSA screening if I'm seen purchasing a bin Laden book before boarding my flight.  I'm sure I'd eventually end up on a flight, but my feeling is it probably wouldn't be to my planned destination, probably just a first class ticket to Guantanamo.