Some new entrants to the textbook market offer students the choice of very inexpensive e-texts or low cost print versions of the same. These publishers' low cost models mean that they don't send publisher's reps to your office, so you need to investigate via publisher web sites. Usually a textbook is considered low cost if it is under $40.
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The following textbook publishers employ business models that aim to keep costs low and give students a choice of options.