[NVDave]

Especially because many of the changes between editions are gratuitous, just to force a re-purchase of books.

There’s nothing new in freshman calculus, for instance. Absolutely nothing new in the first two semesters of calc or physics in the last 100 years.

Same deal for chemistry, or English.

[Freedom56v2]

Especially because many of the changes between editions are gratuitous, just to force a re-purchase of books.

There’s nothing new in freshman calculus, for instance. Absolutely nothing new in the first two semesters of calc or physics in the last 100 years.

Same deal for chemistry, or English.

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Yeah, one of the tricks my son uses is to buy older editions, but he has occasionally gotten burned with questions at end of chapters.

I knew someone who devoted a lot of effort into writing a college text book. Now that I have 3 in college I know why—very lucrative....