Javascript is required to use Book Library BookLibrary - Joomla Component which allows create online library for buy ebook , Book Library - Extension for Joomla for sell ebooks online library Rachel Mary Z. (B.Sc.), Kinfegabrail Dessalegn (M.Sc.), Kassa Michael (M.Sc.), Mezgebu Getachew (M.Sc.), Semu Mitiku (Ph.D.), Hunduma Legesse (M.Sc.) Mathematics Student Textbook Grade 12