Elements of modern Igbo grammar : a descriptive approach
E. Nolue Emenanjo (1987)
It deals with all the significant linguistic features of the language in a clear, straight forward but non-technical manner.
It covers all areas of the language but concentrates on the sound and grammatical systems in a new exciting way.
It is well planned and systemic and should form a very useful text book for all.
IGB GRAM 1 Open access