From USA Today:
"Bob Stewart, a professor of oceanography at Texas A&M University, refused offers to have his Introduction to Physical Oceanography published the traditional way in favor of writing an open textbook.
Stewart writes in his preface that the book is "a gift … to the students of the world." It is distributed through the U.N. Educational, Scientific and Cultural Organization. Students in China are using it to learn oceanography and English; translations are in the works, including Italian and Portuguese editions."