http://www.bbc.co.uk/radio4/progs/listenagain.shtml
If you scroll down to the Ss, you'll find 'Sound Advice'. Click to listen again and you'll hear a half-hour discussion about how three novelists approach the task of writing a book. One of these is Monica Lewycka (not sure if I've spelt that right as my mum has my copy), author of the wonderful 'A History of Tractors in Ukranian'.
<Added>Marina Lewycka - apologies. Should have googled first!