William S. Hein & Co., Inc. has been serving the library community for 90 years. Our premier online product, HeinOnline, includes more than 150 million pages of legal research material. Now, in more than 3,200 locations in over 175 countries, HeinOnline has grown into a comprehensive powerhouse of research materials and contains more than 9 centuries of history. With nearly one million pages added each month, HeinOnline continues to grow to meet the changing needs of the library community. Content in HeinOnline now includes more than 2,500 periodicals, the greatest collection of world treaties available, and much more.