Combinatorial principles can be difficult to understand from modern textbooks. The more elegant the explanation, the more it is couched in abstract mathematical language. A book that I picked up a long time ago has helped me to bridge the gap between those elegant, abstract textbook explanations and a concrete understanding of them. The book Lady Luck by Warren Weaver provides a relatively rigorous explanation of probability in plain, clear language. I have turned to this book many times to supplement my textbooks when the textbook explanation of a concept proved elusive.

© Scott Pletka and *Mathematical Tools, Archaeological Problems*, 2011.