Bestsellers by Subject selection lists contain the top 50 titles of a specific subject, based upon YBP/B&T sales figures over the past two years. Libraries with specific collection development needs may request a custom bestseller list. Please submit your requests by clicking here.. May 2008 Allergies April 2008 Early Childhood Education March 2008 Petroleum Refining February 2008 Economics January 2008 Political Science December 2007 Personal Health November 2007 Mass Media October 2007 Computer Graphic Design / Image Processing September 2007 Human Ecology August 2007 Bridge Engineering July 2007 Insects June 2007 HVAC (Heating, Ventilation and Air Conditioning) May 2007 International Relations April 2007 History of Architecture March 2007 Environmentalism (Green Initiative) February 2007 Popular Music January 2007 Theatre Arts December 2006 Communication November 2006 Journalism October 2006 Internet Security September 2006 Computer Networking August 2006 Distance Education July 2006 Photography June 2006 Visual Arts May 2006 Literary Collections - Ancient, Classical & Medieval