So Earth Primer, which used to be “GeoBook,” is nearing completion! It’s been a long journey. I won’t say much about it here because I’ve been working very hard on a web page and trailer (www.earthprimer.com). It should be coming out very soon, within the next month or so. As soon as the launch date is fixed I’ll post an update.
[Update: Earth Primer is out. App Store link.]