Baedeker of pre-1872 guides continued to be printed where all Baedeker guides had been produced before—the G.D. Baedeker printing works in Essen. Fritz ventured into territory none of his predecessors had covered before, inside and outside Europe e.g. Russia, Sweden, Norway, Palestine, Syria, Egypt, Greece, the Mediterranean, USA, Canada, India and South East Asia. Plans to publish guides on China and Japan had to be abandoned when war broke out in 1914. At home, the list of guides on German regions and cities continued to grow. His was the golden age of Baedeker travel guides. Fritz also had the good fortune
Baedeker guides. Baedeker would provide the text and Mair the finished product. The Baedeker Autoführer Verlag, Stuttgart was born. The slim guides called "Baedeker-Shell" guides were designed to fit into a man's jacket pocket or in the glove compartment of a car. The first ones covered Germany and were a huge success. Guides on other European countries followed in both German and English. Karl Friedrich was now operating on two fronts. He continued to produce city and regional guides from Malente and with the publication of his 1954 "Berlin" guide in German, English and French, the Baedeker brand had been well