In Cairns: Messengers in Stone, geologist and acclaimed nature writer David B. Williams (Stories in Stone: Travels through Urban Geology) explores the history of cairns from the moors of Scotland to the peaks of the Himalaya -- where they come from, what they mean, why they’re used, how to make cairns, and more. Cairns are so much more than a random pile of rocks, knowing how to make cairns can drastically alter the meaning of the formation. Hikers, climbers, travelers, gardeners, and nature buffs alike will delight in this quirky, captivating collection of stories about cairns.