Don't underestimate the Internet, Bob. 70% of American households have computers. There may be some people who don't have computers but I'm willing to bet the majority of HL collectors do. While lighthouses themselves are historical and tend to stay where they're put, collecting HL models is not a passive hobby. There's tons of lighthouse books, but a guide is not about lighthouses, its about the models and the hobby. Keeping information fresh and interesting is a key part of a thriving hobby!