This is the third edition of this popular trekking guidebook, updated after the disastrous earthquakes of April and May 2015. It remains the definitive introduction to trekking around Manaslu and the Tsum Valley. Additional information covers Lower Manaslu. A brief outline of routes across the adjacent Ganesh Himal / Ruby Valley to the east, and the Lamjung area, linking Manaslu to Annapurna in the west, is included. It may not have the aura of Everest or Annapurna, but the majestic mountain of Manaslu (8163m) has a remote charm that calls on all trekkers to discover the undiscovered. Lush forests, terraced hillsides, mysterious canyons, gargantuan summits and Buddhist culture are enticing. For so long beyond the horizon, the Tsum Valley is astonishing and secretive. Hilltop monasteries, traditional villages, colourful people, enigmatic yaks and hundreds of mani walls, chortens and kani gates add to the compulsive blend. Go soon to Manaslu and Tsum Valley!