A mix of memoir, travel and popular science, charting journeys across deserts, through jungles and up ice caps, to some of the most important volcanoes around t

Mauna Loa rises more than 13,000 feet (4,962 meters) above the Pacific Ocean. It is the largest volcano on Earth. Discover more in Mauna Loa, one of the titles

Text and photographs examine several aspects of these natural wonders including their lava flows, rocks, springs and geysers, and geothermal energy.

Viva members around the world contribute to the travel guides' creation and updating. They provide information concerning hotels, restaurants, tours, shopping,

'The challenges posed by risky decisions are well documented. These decisions become even more daunting when they must be made in a midst of a crisis. Using the