Not always . But they ' re under $ 10 , and they ' re a good idea . I ' d suggest doing it anyway . Why risk getting held up in security ? <| sep |> I feel for the Americans . Here in Australia the lectures have to provide all the material needed to study the unit . If there is something needed from a textbook , they usually just scan it and hand it out to everyone . Or give you the page numbers for current and past editions of the textbook to obtain yourself . 3 and a years into my engineering degree , I ' ve spent $ 0 on textbooks . <| sep |> because humans are fearful of change <| sep |> You taking my shoes again ? !?!<| sep |> Of course it ' s possible , but I ' d say SK has a solid defensive position . Most prevalent attacking lines seem to leave white in a very cramped position , opening up substantial counterplay . My money is on draw .