Learn Prolog Now (lpn.swi-prolog.org)

"Learn Prolog Now" is a compact, self-contained course and textbook designed to get beginners—including those with little or no computing background—up and running with Prolog quickly. The authors emphasize practicality: the book pairs clear, self-study-friendly explanations with exercises and “Practical Sessions,” and points readers to readily available Prolog interpreters so they can code along. It’s explicitly positioned as a solid foundation rather than an exhaustive reference; readers are urged to practice actively and provide feedback for future revisions. For the AI/ML community, this resource matters because Prolog remains a core tool for logic programming, knowledge representation, symbolic reasoning, rule-based systems, and constraint solving—areas increasingly relevant to hybrid neuro-symbolic approaches. The course’s hands-on focus helps learners build the declarative programming and reasoning skills that complement statistical ML methods. Technically, it offers a pragmatic route into unification, backtracking, recursion, and rule-based inference through exercises and interpreter use, making it a useful stepping stone for students, educators, and practitioners wanting to apply or teach symbolic AI techniques.