There is a very good search engine for second hand books: https://www.bookfinder.com/ https://www.bookfinder.com/ If you're not from US and you don't need phy

There is a very good search engine for second hand books: https://www.bookfinder.com/ https://www.bookfinder.com/ If you're not from US and you don't need physical books buy a used one, deliver it to a book scanning service like https://1dollarscan.com/ https://1dollarscan.com/ (used them for several books recently) And for 30-40 USD (or even less) you'll get a scanned version.