What happened when I gave away 6400 books?

Marketing that works?

I put a question mark after it because it’s always a question, right?

What works now and will keep working so I can just focus on WTDT. (Writing the Damn Thing)

Because based on a couple of years doing this, nothing sells your last book like the next one.

Seems like you read that somewhere before? Yeah, there’s a reason it’s repeated over and over. Because that is the one marketing thing any writer can do, and should do that will help you grow your business.