books.google.com - Mathematician Ian Stewart tells readers what he wishes he had known when he was a student. He takes up subjects ranging from the philosophical to the practical-what mathematics is and why it’s worth doing, the relationship between logic and proof, the role of beauty in mathematical thinking, the future...http://books.google.com/books/about/Letters_to_a_Young_Mathematician.html?id=FOkPrY-HQVQC&q=trisect+the+angle&utm_source=gb-gplus-shareLetters to a Young Mathematician