Today's helpful resource isn't actually a book although it may often be published in book format. Today I'm going to talk a little bit about the importance of court rules and how vital it is that you know the applicable rules for your jurisdiction.
The United States of America has several collections of federal rules, all of which are used in various federal courts. These rules are used throughout the United States irregardless of the geographical location. Most of us know that such rules exist, but it can sometimes be a bit painful to find them, and then to understand them once we've found them. Here are a few sites with links to the original rules.
Cornell is one of my most favorite sites! Not only does it include easy access to federal rules and the US Code among numerous other resources, Cornell LII also provides explanatory footnotes, case references, and committee notes.
The U.S. Courts website includes searchable PDF forms of the Federal Rules. These are updated as the Rules themselves are updated.
The individual States of the USA also have court rules specific to their state courts. These rules often follow the federal rules, but there are also numerous instances in which they differ. Here is a list of the individual court websites for each state and their court rules.