For an introductory crash course in LISP, several users recommend looking at Paul Graham's book, which offers practical "how-to" explanations and exercises. The book's website provides access to two online chapters, allowing potential readers to sample the content before purchasing. Participants emphasize the importance of hands-on exercises to reinforce learning. Additional suggestions for LISP resources may also be found in the discussion, focusing on clarity and practical application. Engaging with these materials can significantly enhance understanding of LISP programming.