Whatever you have to prove, Binder on Pennsylvania Evidence can be your guide.  The book gives you what you need to know about Pennsylvania evidence, both the codified rules and the common law.  With point-by-point commentary and analysis of each evidence topic, David and Bret Binder have created an easy-to-read, reliable, practice tool. Additionally, with cross references to cases and other rules, you get a quick jump-start on additional research and fast identification of supporting authorities.