Very, very sorry. Posting to two college related threads at the same time.
So here’s the textbook post:
As a student, I never used a book written by a prof. As a professor, very view profs in any dept. I was with ever wrote and used their own textbooks. In almost all cases where they did it was because in Computer Science it’s all new and there just wasn’t a good textbook in the field yet. The two cases that come to mind most are:
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In job 1, two profs wrote one of the first textbooks in the field. It became a bestseller by academic standards. No other book around that time came close. Not using their book would have been stupid.
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In job 2, we hired the co-author of one of the most famous and respected CS texts ever. We were already using it, we kept using it. Not using his book would have been worse than stupid.
In short, I don’t think that “having to buy the prof’s book” is that common and not always a bad thing.
Some things to keep in mind about textbooks:
They are really, really hard work to produce. Far harder than producing a comparable number of pages of journal articles. Like I’ve said, I’ve known textbooks authors. In general they end up realizing they’ve wasted a lot of time for very little money. It’s not something that most profs take lightly.
In my younger years, I was already quite well known in my field which was just getting off the ground. Many publishers tried to lure me into writing a book, especially when they heard that I was teaching a course on it with course notes. But there was just no way it was going to be worth my while. (And over 20 years later there still isn’t a remotely decent book in the field. Profs are just not falling over themselves to write textbooks.)
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In Computer Science, there is no way you can get by using a 5 year old book in most areas. In many courses, a 2 year old book is ancient history. So once your write a book in CS, you have to extensively revise it every couple years or it’s out. Who needs that?
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I never saw or heard of publisher perks to choose a book outside of preview copies. And then, quite a few were stingy about those. (Even if you pick the book, getting the instructor’s supplement was sometimes a pain.) No money, no meals, nada, nothing.
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Many posters are under the false impression that the cost of a text should be ~ the cost of printing it. Ha! Printing is the cheap part. Producing, promoting, distributing the book what costs money. And these are very real, very costly, unavoidable components.
I have reviewed for publishers drafts of books submitted for consideration. (And get a whopping $100 for it!) These drafts were invariably terrible and required an extensive amount of editing to make them publishable. (Somehow, no publisher ever took my “No, walk away from this garbage.” advice and turned a project down.) This is not cheap work.
In other threads in the past, people have explained why bookstores charge so much over “retail” prices, because of the special system set up to allow returns and such. That adds a lot of cost.
Consider the cost of producing the book to be zero and everything else is the real cost.