<div dir="ltr">So, when someone comes along and threatens this business model, publishers are swift to react. Offensive efforts -- like locking schools into yearly purchases for instructors' versions and acting as "partners" in campus bookstores -- have mitigated most of the damage caused by outside forces like Amazon and used book retailers. <div><br><a href="https://www.techdirt.com/articles/20150103/10533729588/developers-chrome-extension-that-finds-cheaper-textbook-prices-receives-legal-threats-major-textbook-supplier.shtml">https://www.techdirt.com/articles/20150103/10533729588/developers-chrome-extension-that-finds-cheaper-textbook-prices-receives-legal-threats-major-textbook-supplier.shtml</a></div></div>