Sketchy LISP is a step-by-step introduction to functional programming in Scheme. It covers various aspects of the language including data types, conditional evaluation, list processing, lexical scoping, closures, recursion, dynamic typing, etc. By means of numerous examples of varying complexity, it takes the reader on an entertaining and informative tour through the language.The Scheme language achieves what only few languages have managed before: to bring fun back to programming. Its simple syntax, clean semantics, and powerful functions open the door to a fresh perspective on program design. Programming in Scheme is fun, and this book is an attempt to share some of that fun.