Hitler was so obsessed with the secrecy of his plan to seize Norway that he told almost no one about it. He appointed General von Falkenhorst to command the attack on Norway and Denmark. Although German Army High Command had many, many maps and theoretical plans to seize Norway, Hitler did not want Falkenhorst to talk to anyone there. According to the memoirs of Major von Below in At Hitler’s Side,:
therefore Falkenhorst bought a Baedeker’s guide to Norway, retired to a hotel room for a few hours and presented Hitler with an outline plan that same afternoon. It was accepted.