Antony Beevor

When you write your first book aged 25 or so, you have 25 years of experience, albeit much of it juvenile experience. The second book comes after an extra year sitting in bookshops. Pretty soon, you begin to run on empty.

The way that Dickens structured his books has a form that we most readily recognize now from, say, the great T.V. series, like 'The Wire' or 'The Sopranos.' There's one central plot line, but then from that spin off all kinds of subplots.