Chimamanda Ngozi Adichie

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Chimamanda Ngozi Adichie's debut novel, Purple Hibiscus was long-listed for the Booker and short-listed for the Orange prize. She talks to Mariella Frostrup about following such a successful start, about her new book Half of a Yellow Sun, set during the Nigerian-Biafran war in the 1960s and why she's a bit embarrassed about her Dad reading it.