I have no idea on what my father based this and I’m sure he was genuinely trying to console, but for years afterwards I avoided novels that mixed politics and facts, particularly historical novels. Writers should just make it up, I thought. Feelings were what counted: feelings, ideas, characters and story. But then, thankfully, I was given Rose Tremain’s best-selling and Booker short-listed novel Restoration, and, plunging in against my better judgement, was immediately hooked.