Where do those whose professional lives center on food eat in London? Joe Warwick asked that question of 150 of the city’s most informed foodies, and the answers cover a surprising range, from haute, Michelin-rated destinations to celebrity-chef venues to ethnic gems off the beaten track. Color photographs show every choice, while the pocket-sized format makes it all portable. A discreet design won’t let anyone know that the person holding the book is a tourist.