“Enter in silence and in orderly form,” enjoins the sign above extras queueing at the Cinecittà film studio for work in Quo Vadis (1951): one of the photos in Dolce Vita Confidential: Fellini, Loren, Pucci, Paparazzi, and the swinging high life of 1950s Rome by Shawn Levy, widely praised on publication last year and now in paperback (Orion, £9.99 (£9); 978-1-4746-0616-5)