books.google.com - "A very stimulating book ... in a class by itself." American Mathematical MonthlyAdvanced students, mathematicians and number theorists will welcome this stimulating treatment of advanced number theory, which approaches the complex topic of algebraic number theory from a historical standpoint, taking...http://books.google.com/books/about/Advanced_Number_Theory.html?id=yMGeElJ8M0wC&q=Ideal+Structure+Genus&utm_source=gb-gplus-shareAdvanced Number Theory