A book of fundamentals is a crucial resource for any field of study, providing essential knowledge and principles that are necessary for understanding more complex concepts. Synonyms for the term include guide, primer, handbook, manual, textbook, and introduction. A guide book of fundamentals assists with navigation through a complex subject while a primer can be seen as a starting point. Handbooks are practical and are designed to be used as a reference tool where manuals focus on specific procedures or skills. Textbooks are educational books used for study purposes while introductions are beginner-level textbooks. All of these synonyms for the book of fundamentals serve as essential resources, providing a foundation for learning and exploration in any field.