The author has been climbing and watching glaciers all his life and shares his love and respect with us; the problem is that the glaciers are disappearing. Every time he re-visits a glacier, the base camp has moved inland to stay close to the retreating ice. Within about 30 years, it looks like the only ice left on the planet will be at each pole and on top of the Himalayas. The real problem is that melting ice is a buffer against climate change; when the ice goes, things will heat up a lot faster. The book is brilliantly written, both a tribute to the world that was and a warning about the future. It will inform and anger you.