How-to books are valuable resources for anyone looking to learn a new skill or improve their knowledge on a particular topic. These books come in different formats, including guidebooks, instructional manuals, and DIY manuals. Synonyms for how-to books are numerous and vary based on the content and purpose of the book. Some alternative names include self-help books, instructional guides, how-to manuals, learning guides, DIY guides, and tutorial books. In summary, regardless of the term used, how-to books remain an essential tool for self-learning, personal development, and improving one's knowledge and skills.