That pursuit is obviously also a part of filmmaking for Mr. Moskowitz, and it's plainly visible in "Stone Reader," a filmed chronicle of the way books stack up, literally and metaphorically, in people's lives. He interviews a friend about a childhood fixation with the Hardy Boys mysteries, and "Stone Reader" is just such a clear-eyed chase. Like the Hardy Boys books, this film is enchanting and diverting but not resonant.