Working on a book will, of course, have an impact on my work here at planetary.org. I simply won't have as much time to do the things I do now. However, I am hopeful that I will manage to delegate more of my behind-the-scenes work, so that the impact on my blogging should not be as great as the impact is on my unfortunate coworkers. I am grateful to The Planetary Society for their support.

One change you may already have noticed is that because I am writing a book about Mars, there is going to be more stuff on the blog about Mars than there used to be, because that's what I'll be reading. I have a lot of reading to do. That will necessarily reduce my coverage of other parts of the solar system. That is already frustrating me a little bit, because I am very loyal to my friends in the outer planets and asteroids and Mercury and Venus and Moon communities and I am sensitive to their constantly feeling overshadowed by Mars. But there's nothing I can do about that, except to plan to write my next book on something other than Mars (or at least not exclusively Mars).

As I already do for human and private spaceflight and exoplanets and Earth science and policy, I will be leaning on guest bloggers to write about the things that I am not writing about. Fortunately, I know a lot of researchers who really are quite excellent writers. If you are a scientist who thinks I am not writing enough about your favorite part of the solar system, then please consider volunteering a guest blog entry! I will be happy to edit your writing to help you reach this blog's audience.

This is a long-term project. The completed manuscript is not due until the end of 2014, after the end of Curiosity's primary mission. One hopes that Curiosity will still be going strong at that point, and it's quite likely that the best part of her mission will come after the time chronicled in my book. But that's okay. That just means they'll have to offer me another contract to update it for a new edition, right?

Since I'm talking about career changes and all, it seems appropriate to mention that my kids are now old enough that I've also lifted my self-imposed travel ban for public speaking engagements. Here's a page with my appearance calendar and some sample talk topics and so forth; please do contact me if you'd like to arrange for me to speak at your event.