Former head of MI5 Eliza Manningham-Buller and Turkish author Elif Shafak discuss their favourite books with presenter Harriett Gilbert. Chimamanda Ngozi Adichie's Americanah, Gentlemen of the Road by Michael Chabon and The War Between the Tates by Alison Lurie all come under discussion. Memories of university in the 1960s and feelings about home are among the topics discussed