LEAD:

In 1967 the eastern section of Nigeria, dominated by a minority tribe, attempted to form a separate country: Biafra (bee-AFF-rah). The civil war which followed killed tens of thousands of people. Chimamanda Ngozi Adichie (Chim-ah-MAHN-dah  n-GO-zee  Ah-DEE-chee-eh) follows the lives of well-to-do twin sisters and their poor house-boy through the disaster and famine which followed in Half of a Yellow Sun.

RUNS:  5:30

END CUE:  "...published by Knopf Canada."