All the textbook vendors do this. It's such a rackett. God forbid they leave any money on the table. BTW, they SUCK at software. Many of their packages require local installation of software to each workstation. No web-based options. Works for any OS you want as long as it's winderz. I HATE dealing with those jack-wagons. CDE and CA state legislature would be wise to either promote open source textbooks or start holding the vendors' feet to the fire., esp given the current fiscal climate.

Finally an accurate description.