i have to let you know that my boobs are sagy. i feel like it's a responsibility.ured there was a book in there somewhere. >> so i said, what am i going to write about? write what you know. >> reporter: and she knows the beauty business. her novel "model land" is a sci-fi story of an aspiring young model with very familiar features. >> she's 15 years old. she's around 5'9", 5'10", thin and awkward. she has a very large forehead. >> reporter: the message is that any one of any size, shape or color can be beautiful. >> model land has monsters and mutants and all kinds of crazy stuff but it's still about the definition of beauty. >> reporter: the novel is only the latest edition to an ever- growing media empire. so to help manage it all, tyra banks is a student at the mother of all business schools. that really famous one up in boston. is there something to it being harvard? >> most definitely. most definitely there's something to do with it being harvard. harvard business school. in order for my company to grow and be the best and to reach these women and to serve th