The person choosing the book is not the person paying for it
In most retail markets, shoppers can reject an expensive product and choose a close substitute. Textbooks work differently: an instructor selects the book for a course, while students must buy it to keep up with assigned readings, examples, or homework. The instructor may have good academic reasons for choosing a particular text, but students have little influence over that decision.
That split weakens the usual pressure to keep prices down. Publishers compete for instructors’ adoption, while the cost lands on students—often one required book at a time, across several classes.
Why a new edition can close off cheaper options
A used-copy market depends on students being able to pass the same book along to the next class. A new edition can disrupt that chain. If chapters move, problems change, or page references no longer match the syllabus, an older copy may be harder to use even when much of its content remains relevant. An instructor who assigns material by page number or requires questions from the latest edition may leave students with no practical choice but to buy it.
Edition changes can also reflect real revisions, such as updated information or improved explanations. The economic concern is not that every new edition is pointless; it is that even modest changes can reduce the value of older copies when a course requires the newest version.
The cost extends beyond the cover price
Some books are bundled with online homework or other digital materials. When access to those tools is tied to a particular purchase, a secondhand book alone may not provide everything the course requires. That can make the cheapest apparent option unusable and further limit resale.
The result is a market where students may pay more not because they freely prefer a new copy, but because the course’s requirements make alternatives difficult to use. A book that could otherwise circulate among several students becomes, in practice, a one-course purchase.
