<p>try to buy the older version of the textbook whenever possible, it’s always much cheaper</p>
<p>one of my professors required a new 6th edition of a textbook, i looked online and found the 5th edition and compared both of their table of contents and searched through random pages, and both books were literally the exact same except for a “case studies” which were updated according to current events in the new version, but they aren’t important at all and are never actually read. i ended up saving 120 dollars just from buying the older version of that textbook on amazon</p>