Peter Larsen has co-authored several books with Ben Erickson on French cars and coachbuilders, including works on Talbot-Lago, Jacques Saoutchik, and Jacques Kellner as well as an ongoing project about Joseph Figoni. He judges at a number of international concours, including the Pebble Beach Concours d’Elegance in Monterey, California, where he also serves on the Selection Committee. Larsen also judges at the Chantilly Arts & Elegance in France, the 21 Gun Salute Concours d’Elegance in India, the Salon Privé concours in England, The Amelia in Florida, as well as The Audrian in Rhode Island.