Problem: Make a good-looking mathematics book (or paper) in an electronic format

Problem: Make it easy to navigate the rich structure of a mathematics book

Problem: Convert one source to multiple output formats

Opportunity: There are great interactive widgets you can put on a web page

Solution: very structured source, easily translated to a variety of outputs — traditional, new and unimagined

Joint Work: David Farmer, Steve Blood, Michael DuBois

Support: UTMOST (NSF Education Grant), Shuttleworth Flash Grant