You're probably correct. There is no way that a paperback should cost $35.
In third place behind the insurance industry and lawyers come the textbook thieves.
There's also no way a textbook should cost $80-135 for high school math and science. But they do. The material covered is almost exactly the same when a "new" edition comes out. They just fiddle with chapters. A two-volume hardcover version might come in at about 2/3 the price each.
Now they are starting to offer the books on CD. SAME price as the hardcover.