Swapping the nine-to-five grind for the freedom of the great outdoors, Johnny Muir set off on a 5,000-mile cycling and walking odyssey. His mission? To visit the summit of the United Kingdom's 92 countries--in 92 days. Never mind unexploded shells in Yorkshire, biting bugs in the Cairngorms, or the grueling task of climbing the equivalent of 14 Everests, The Heights of Madness is a celebration of Britain's high places. If you've ever wondered what the highest point in Norfolk is, or why 500,000 people climb Snowdon every year, this is the book for you.