The 2006 GSA Annual Meeting in Philadelphia provided a unique venue for the geologic and historic exploration of the Middle Atlantic States. Excursions into Geology and History is a collection of 13 papers and accompanying field guides that explores topics ranging from fossil plants of the Pennsylvania Anthracite basins, to the use of slate as a building stone, to the structural geology of Appalachian orogen transects, to coal basin mine fires, to the geological influences on the outcome of the Civil War battle at Gettysburg, America’s most hallowed ground. The book will prove to be a valuable educational resource for geologists and historians alike.