Not for SALE in the United States

[EternityMech]

so all my american books have that label (i live in Europe) what content could possible be different between these two versions, i know you use the metric system for science just like us...is it that you keep all the juicy secrets in the us version??

 

[Mech_Engineer]

The difference is probably in licensing regulations, one confroms to US licensing regulations while the other (european version) might not need to.

This same topic was brought up in 2008 as well: https://www.physicsforums.com/archive/index.php/t-249155.html

Textbooks are copyrighted material, and foreign publishers selling products in the US or North American would be in violation of copyright/trade law (if textbooks are pirated) or licensing agreements (if their license agreement expressly forbids such activity). Legal action is at the discretion of the seller and authorities.