[JohnBerryman]

I wrote a book (https://www.manning.com/books/relevant-search). Considerations: are you willing to write the book assuming that you will effectively make nothing in direct proceeds from the book? (Close to true.) The upside from a book is in monetizing on it indirectly. For instance, as a "though leader" you'll be able to garner a higher salary at your next job or you'll be able to ask for higher rates for consulting. But the catch here is that you've got to be willing to put yourself out there, otherwise it's a nice bullet point on your resume.

Oh yeah - and don't underestimate the time and effort involved. (I know you mentioned it in your post, but still.) A due date, even if fairly far off, looms ominous. For a year you'll have trouble relaxing and having fun because you know you should be getting work done on the book. You won't have weekend back for quite some time.

Would I do it again? Yep. Will I do it again? Nope. (At least not likely :D )

Good luck!