Set of 4 books on mountain climbing training: Shigeru Saito, "The Diet That Creates a Body That Can Climb Mountains for Life, Taught by the Director" Shigeru Saito, "A Body Strong Against Infectious Diseases Created by Mountain Climbing - How to Deal with the Coronavirus" Shigeru Saito, "The Power of the Body Changes Mountain Climbing - Health Abilities That Can Be Extended This Far" Noboru Kubota, "Physical Training for Mountain Climbing" Overall, they are relatively clean as they have hardly been read. However, "Physical Training for Mountain Climbing" is an old book, so while it is still readable, it has considerable damage.