Dean, who started designing for Penguin almost 20 years ago, then moved from there to Picador and Random House, now oversees all of Cornerstone and Vintage publishing; this week, she was the only designer included in The Bookseller’s list of “100 most influential people in the book trade”. Over the years, she has come up with a vast number of diverse and memorable covers: the silver first edition of Donna Tartt’s The Secret History, the hardback of Don DeLillo’s Underworld, Ian McEwan’s Atonement and Mark Haddon’s The Curious Incident of the Dog in the Night-Time, to name a few. Yet she has only started to put her name on them in the last four years or so.