I was wondering if an author of ebooks, who is registered as self employed as a freelance writer in the UK, can visit the USA on the Visa Waiver Program and continue to write, if he or she does not publish? The principal purpose of the visit is for a holiday, it would just be something to do on the side now and then.
As I understand the definition of work, as long as the author in question doesn't try to make money by publishing while visiting under the VWP would be within the rules, but the definitions of work seem a little confusing.
An example for clarity, a writer who in his/her free time decides to write some pages of a new novel while on vacation, but doesn't intend to publish it until he/she returns to their own country.