Don’t publish an anthology of books 1-3 before your fourth book comes out. I’d done it thinking I’d advertise it, thinking under normal circumstances no one would want to purchase a book from an unknown author for $7.50. 

I was wrong—not by a lot, but 2 or 3 sales a day on Amazon add up to a lot. It was kind of great that people had so much faith in me, but it drove down sales of books 2-3 and bumped them to the second page of my genre. I “unpublished” it yesterday, and Monsters and Chaos are climbing the ratings again.