it actually wasn't until michael drake passed away in 20 o 11 that i sort of pulled off that writing out of a drawer and thought i think i can turn this into a story that would honor his vision that that was an important thing to capture. smtion that was under desert skies how tucson mapped its way to the moon and planets what are you in tucson now? >> i'm actually i live up in flagstaff now and i didn't know i was going to be a science writer so this project launched me into that career, and i'm working on -- a second book out called mythical river working with on a third one which is going to be about planetary catastrophes. mythical river what's the topic? >> water issues in the southwest. so again it's my second book -- and kind of my vision for that book there was a -- a mythical river that map makers evented in buena research have a that staid on maps for 25 years but it didn't exist and no river flowing from the great salt lake to california but this vision of water abundant quarter that is not actually here in the southwest so i use that as metaphor to talk about how we're ou