Amateur Astronomy, Geology including the Affects of Climate through the ages, Archeology, Roman Architecture, Poetry, Science Fiction (no fantasy S.F. please): Authors like Isaac Asimov, Jack Williamson, Charles Eric Maine, Edmond Hamilton, Phillip K Dick, Robert Silverberg, Eric Frank Russell, Phillip Jose Farmer, Clifford Simak, J.G. Ballard, all of the works of Eric Hoffer
