Online booksellers often denote "mass market" vs "trade" paperback which does potentially give you info on the quality of the paper. "The paper quality is bett

Online booksellers often denote "mass market" vs "trade" paperback which does potentially give you info on the quality of the paper. "The paper quality is better as well, as most often they are printed on acid-free paper like a hardback book." - https://biblio.co.uk/book_collecting_terminology/trade-paperback-27.html https://biblio.co.uk/book_collecting_terminology/trade-paper... (I've found this to be relevant when sourcing physical copies of out of print books.)