the igbo of southeast nigeria by victor c. uchendu from case studies in cultural anthropology published by harcourt brace jonanovich college publishers , 1965 the nigerian legal system by charles mwalimu published by peter lang pub inc ( august 30 , 2010 ) introduction to igbo medicine and culture in nigeria by dr. patrick e. iroegbu published by lulu.com publishing , 2010 half a yellow sun a novel by chimamanda ngozi adichie published by anchor books , 2006 the bottled leopard by chukwuemeka ike published by university press , reprinted 2001 ( authors note : these last two are works of fiction by igbo authors and were used to provide general background on igbo history and culture .