My school's bookstore was sold out of this book so I forced to buy this on amazon. The access code the publisher provided did not work with their website that was being used by my professor. I found out after spending about an hour on their technical support that they several web sites they use and each one has it's special own access code and theres no way to know which one will work with which if ordered on line. Even after purchasing another code(an extra $85, because we students just have that laying around) the website constantly crashes and lets me log in about half the time. I guess the book might teach me some thing, but by the time I'm able to try to accomplish anything, I want to smash my computer into the wall. Unless you want to smash your computer into the wall, I strongly suggest you say some thing to your professor or school to change publishers to keep from having to deal with this second rate text book.