LAKE GEORGE Anyone who has hiked the Adirondacks should be aware of the fragile alpine terrain near and at mountain tops. A new book published by the Adirondack Mountain Club (ADK) is designed to help hikers identify and conserve summit life. Adirondack Mountain Summits; An Ecological Field Guide by Nancy Slack and Allison Bell contains conservation tips as well as fresh photos of alpine species including wildflowers, birds, lichens, small mammals and other life forms that survive on Adirondack peaks. The book is the winner of the state Outdoor Education Associations Environmental Impact Award, and is filled with colorful photos along with important information. Slack is a plant ecologist and works as a professor of biology for the Sage Colleges and is also president of the American Bryological and Lichenological Society. Bell is a designer and photographer working out of Northampton, Mass. This 80-page full-color softcover book is available at book and outdoor supply stores, at ADK stores in Lake George and Lake Placid, through mail order by calling 800-395-8080, or online at www.adk.org.