# On finite sums and products

I'd like to get a good book on finite summations and products before I study infinite series more in depth next year. The book should cover geometric/ harmonic sums and prove different formulas for finite products. Some geometric intuition thrown in with the algebra/ induction would of course be a plus. Does anyone have a good recommendation? If no such book on just finite sums and products exists then do you know of a good book which covers them as part of a broader topic?