Back by popular demand, Native Concordian, world-renowned naturalist, lecture, birder, and author Peter Alden will present his new memoir, My Wild Life: Rare Birds, Close Calls, and the Adventures of an Eco-Explorer. Book signing to follow. Alden will share stories and photos from his decades of travel to over 100 countries and 7 continents. All ages are welcome. Signed copies available at the Thoreau Society's Shop at Walden Pond. Parking is first-come, first-served. On sunny, hot days, Walden Pond often closes entry due to capacity. If this happens, we will post a DCR Park Alert at mass.gov/parkalerts and update our phone message at 978-369-3254.