I bet you'd find lots of people interested if you start telling your stories. If you'd like to write about how your books came to be, for example, a good publication is The Pub, run by Smillew Racheuf.

Or maybe you have only an idea or anecdote of 150 words or fewer? You could submit that to Everything Shortform. Kevin Alexander (@kevinaalexander) and the other editors publish very fast, so it's a good pub to write for if you're of the school that says "instant gratification takes too long." If you let Kevin know you've done books for Hachette, I suspect he'd accept you in an instant.

I've written a lot for both publications and had good experiences:).