Let me include some hard, cold, firsthand-experience facts here.
- Why do they cost so much?
Part of the answer is “because they can” (more on that in a moment), but part of it is a matter of economics of scale. Let’s compare, for example, a highly-specialized textbook that I wrote to one of my children’s books that I wrote that same year. In both cases, the publisher set the price, not me. In both cases, the publisher has raised the price since the book was released. The children’s book has sold over 50,000 copies, and in that same amount of time, the textbook has sold around 4,000 copies. My previous book on that subject sold fewer than 2,000.
Let’s forget, just for a moment, that one book is 48 pages and the other is 400 pages. That might account for a factor of two price difference, but certainly not the factor of six that actually exists. When you sell ten times as many books, the cost per copy of editing, proofreading, copyediting, cover design, art, page layout, indexing, and so on is only 1/10 as much.
- Who makes the money?
Despite Hari Seldon’s assertion to the contrary, authors don’t necessarily do really well. Royalties (per copy) aren’t much different from non-textbook writing, and there are many textbooks that are staff-written, meaning the writers get their same salary whether the book sells for $5 or $500; whether it sells 100 copies or 100,000.
Again, to use my Closed Captioning Handbook as an example, the retail price is $71.95. The bookstore is buying it from the publisher for 40% off, so they make $28.78 per copy sold (obviously, most of this goes to overhead, staffing, and so on). The school bookstore may be franchised, or college-owned. Either way, the school is getting a piece of that. As the author, I only make a few bucks a copy (around a tenth of what the bookstore makes). The instructor makes nothing.
Incidentally, that particular book wasn’t originally released as a textbook. When colleges picked it up as a text, the publisher raised the price by $20. That should tell you something right there.
- Why the new editions?
As a former college instructor, I believe that my success in teaching the students was largely based in my ability to tie the subject matter to their lives–or at least to the real world they lived in. Several people in this thread have used calculus as an example. It hasn’t changed in 200 years. Why change the book?
Since I got out of college, I’ve certainly used calculus for the same kinds of things they used it for 200 years ago (e.g., calculating optimal dimensions of a water tank), but I’ve also used it in my own area of expertise: software and electrical engineering. I have a strong preference for books that include examples tied to my own students’ majors. When I’m teaching a software engineering class, I want a calculus textbook that shows how to use calculus to determine whether it’s more efficient to use fixed- or variable-length fields in a directory.
However, the professor often doesn’t get to pick the book. It thoroughly pissed me off that one college I taught for changed my textbook every year even though the subject matter hadn’t changed. I already knew the old textbook, and didn’t want to change. But the school made me change it so that students couldn’t buy used textbooks from the previous class, hence making more money for the school bookstore (and, therefore, the school).