The book of Philadelphia is a title suggestive of a large task. Philadelphia is complex, old, still growing, and he who understands her and writes of his understanding so that others may share it must have energy, insight, and skill. Mr. Shackleton’s book bears ample evidence of his powers as an interpreter; his previous efforts at baring the souls of New York and Boston have given him a penetrating vision and a sureness of touch that find full scope in his book of Philadelphia. He has given us far more than a guidebook for the tourist or casual sojourner; his observations and comments have a character that should make the book even more valuable to Philadelphians than to outsiders.