Kamen's style is Read this excerpt from "On Becoming an Inventor" by
Dean Kamen

From this well-stocked basement came a whole new
set of really neat projects. My younger brother, Mitch,
and his friends, as well as some of my own friends,
would come after school to help. At sixteen I was now a
young entrepreneur, paying them for their help. I was
surprised by the number of orders I was getting for
more and more equipment. Soon I didn't have time to
build and design new things. Giving over this work to
other kids gave me more time to do what I wanted to
do. This went on after school and all summer long.
informal; he uses slang to entertain his readers.
informal; his purpose is to inform and entertain the
reader with his personal experiences.
formal; he uses complex words and ideas to inform
the reader of complicated scientific procedures.
formal; his purpose is to persuade the reader to take
part in important scientific inventions.