Download Common LISP: A Gentle Introduction to Symbolic Computation by David S. Touretzky, This book is about learning to program in Lisp. though widely referred to as the principal language of artificial intelligence research—one of the foremost advanced areas of computer science—Lisp is an excellent language for beginners. it's more and more the language of choice in introductory programming courses because of its friendly, interactive environment, rich data structures, and powerful software tools that even a novice can master in brief order. Download the pdf from below to explore all topics and start learning.