A couple of weeks ago I signed a contract for a book. Now I'm knee deep in writing it...or at least ankle deep. The working title is A Field Guide to the Molecular World - what a scientist, particularly a chemist sees as she walks about. I've got a reasonable working draft of a chapter done - on molecular clocks. There are natural stopwatches and timers all around, if you know how to read them.
I've written about 1500 words a day so far...you can watch the count on the sidebar.