O'Reilly reached out to you and said, hey, that's a school you write a book. So I think it was a great endeavor from O'Reilly. She was basically looking for Python content and she ended up on my blog at the time. At some point, she came to Portland for a conference and we met. And basically after that meeting, yeah, she said, well, send a proposal. We really like to have a book on Flask.