The book “Orda Cave Awareness Project” (by samebody)
It is dedicated to the biggest underwater gypsum cave in the world. It is located near Orda village (Perm region, Russia). The book contains articles by geologists, stories about animal life of the cave, interviews with pioneers, reviews by leading experts in cave diving. The book is illustrated with more than 100 unique underwater photos. Also the first published map of Orda cave with additions and clarifications. The work on the book took half a year, the team made more than 150 dives. All 5 kilometers of its underwater galleries were photographed. ordacave.ru.