本书的作者罗伯特·卡塞尔是自由软件基金会的合创人之一，也是理查德·斯托曼博士青年时期结交的挚友，他精通GNU Emacs Lisp的每一个方面。本书是一本GNU Emacs Lisp的编程入门，全书循序渐进地介绍了GNU Emacs Lisp编程的各种基础知识和方法，文笔流畅、讲解透彻，对GNU Emacs用户提高对它的理解和运用帮助极大。-Robert Cassell, author of the book is co-founder of the Free Software Foundation, is one of the youth to make a close friend of Dr. Richard Stallman, he is fluent in every aspect of GNU Emacs Lisp. This book is a GNU Emacs Lisp programming entry book step-by-step introduction to the GNU Emacs Lisp programming of all kinds of basic knowledge and methods, the writing is smooth, and to explain thoroughly to improve its understanding and application of greatly helped GNU Emacs users.