books.google.co.uk - This twenty-two volume set presents the appearance and behavior of thousands of species of animals along with species population and prospects for survival in a arranged alphabetically and easy-to-read format....http://books.google.co.uk/books/about/International_Wildlife_Encyclopedia_Rifl.html?id=4QQCfJnu_6oC&utm_source=gb-gplus-shareInternational Wildlife Encyclopedia: Rifleman - sea slug