This year’s Oscars were as much a celebration of books as they were cinema. Five of the 10 best picture nominees were based on books, and three of those – “Oppenheimer,” “Poor Things” and “The Zone of Interest” – took home the most statues overall. Which is why many of those partying in L.A. on Sunday night boarded planes across the Atlantic days later bound for the London Book Fair, in search of their next Oscar-contending project.