So you want to write a pop-sci book: Open thread

Earlier this week David Williams (Stories in Stone), Michael Welland (Sand), and I started a blog series about the details of publishing a popular science book (Parts 1, 2, and 3), but I have been a bit underwhelmed by the response. I had been hoping for some input from other published authors, questions or comments from aspiring book writers, and for the series to take the form of a conversation. Instead I feel like I am talking to myself. Is there anything anyone would like to know about the process of writing a pop-sci book? Or would you all prefer that I just get back to the science posts? Have your say in the comments (and thank you to the few who have commented on, linked to, and tweeted the series).