I'm planning on starting a "chain" of either charter or cost-free/cost-very-little schools. These schools would be high schools, but they'd be for geeks/nerds/people who actually want to learn.
Needless to say, I'm still in the very early stages of this idea.
About your textbook, what branch would you _like_ to write about?
I have always been fascinated by the application of both ordinary differential equations and partial differential equations. The mathematical ideas behind the methods involved in reaching solutions are some of the most beautiful ideas in mathematics. I also find the mathematics of game theory and finance quite beautiful. Any one of these topics are more than enough to fill several textbooks.
Needless to say, I'm still in the very early stages of this idea.
About your textbook, what branch would you _like_ to write about?