Check out this image from the wikipedia article on "science": http://en.wikipedia.org/wiki/File:The_Scientific_Universe.png I'm looking for some recommendations. I'm interested in checking out one (or possibly two) introductory textbooks on each of the subjects in the "hierarchy of science" section. That is: Logic Mathematics Physics Chemistry Cell Biology (or just General Bio) Functional Biology (or just General Bio) Psychology Sociology (I could skip this, honestly I do not consider it a science) Geoscience Astronomy To give you some background, I have a B.A. in Philosophy and have recently returned to school to study Biological Sciences. What's frustrating me is that I am learning things in bits and pieces, but there is no "big picture." I have yet to take any mathematics beyond high school math at this point, and I could probably use some review there, so I would prefer texts that are not math heavy.