and -- and,of course, others at that time thought it hadm at something to do with 13 colonies joined as one. that was the other noterpretation. c-span: wait a minute.w ch a what do you do now for a living? >> guest: i teach at the university of massachusetts at amherst and i teach mathematicsi i'm a lecturer, and i teach large lectures:introductory calculus, precalculus, that sort of thing. so i stand in front of about 200 students at a time and i try tom make some of the intricacies of mathematics interesting, somehow come to life for them. c-span: when was it that you was actually proposed this book toi the free press and when did they buy it? >> guest: i proposed that to to them -- it would have been in -n i'm trying to remember what year. yea it was about two years ago, i believe.beli it had been rejected all overevb the place.en in the process of writing proposals -- i was learning how to write a proposal, and ia r originally conceived of thisf a rely as a reference book, that there would be somelige introduction, a little bit ofant explanation, but it would be largely a collect