Sleep is a Java-based scripting language heavily inspired by Perl. It started life during a weekend long hack fest in April 2002. Some 6 years later this is the result. Sleep provides advanced programming features including continuations, first-class functions, a built-in debugger, taint mode security, access to the Java class library, and cryptic Perl syntax. This manual includes the Sleep 2.1 language tutorial, a guide on how to extend and embed Sleep from Java, and a reference of all built-in functions.