Revolution comes complete with extensive documentation. You can access this from inside the program, via the Help menu. For your convenience you can also download the PDF Users Guide here.
The User Guide is an extensive walkthrough of the major areas of Revolution, with many examples and screenshots showing you how to use the feature set, from basic scripting through Unicode to working with databases. The User Guide contains 377 pages, and is available as a free, searchable, PDF download, or you can buy a printed copy in the store.
The Dictionary is an A - Z guide to every Revolution scripting term, with a definition and example of use for each term, cross referenced to related terms. An invaluable guide to getting the most out of the Revolution scripting language. You can download a PDF of the Dictionary here.