I intend to take a sabbatical to write a book about the domain I work in (I will quit my current job and spend some months to write it). It would be on a topic that some might think it's controversial. I don't want to tell what the book is about but it will expose some problems together with me offering some solutions in trying to make it better. I plan to use a pen name, so it won't be obviously linked to me.
After the book is written I will put it on sale on Amazon and try to make some income from it. Since it's my first book, I don't expect to retire with the sales I make, so at some point I will need to get another job. And then I will need to explain the gap in the CV.
How can I do that without mentioning the book, having the interviewers look at it, and wrongly interpret it's content, thus affecting my chances of getting the job?
Please don't say not to write the book! It's something I think will benefit the domain and I want to write it.