Most people using ChatGPT are only scratching the surface. They ask a question. They get an answer. They close the window. But ChatGPT is capable of far more. In Train Your GPT, bestselling author and Microsoft Excel MVP Bill Jelen (MrExcel) shows you how to build Custom GPTs-- personalized AI assistants that understand your work, your writing style, your files, and your workflow. Instead of starting from scratch every time, you'll learn to create GPTs that become permanent members of your team. No programming experience is required. Using real-world examples from his own publishing and YouTube business, Bill demonstrates how Custom GPTs helped him dramatically reduce the time required to write books, create YouTube content, generate SEO descriptions, proofread indexes, format transcripts, analyze Excel workbooks, and automate repetitive tasks. Along the way, you'll learn not only how to build GPTs, but how to think differently about using AI. By the time you finish this book, you'll begin seeing opportunities everywhere. Need an Amazon book description? Build a GPT for that. Need a newsletter from your weekly notes? Build a GPT for that. Need to analyze spreadsheets, explain formulas, or create marketing copy in your own voice? Build a GPT for that. Inside you'll learn how to: - Build your first Custom GPT in about 20 minutes - Write instructions that GPTs actually follow - Train GPTs using your own documents and knowledge files - Give your GPT your writing style, tone, and personality - Create specialized GPTs for writing, research, education, marketing, and business - Automate repetitive workflows and content creation - Connect GPTs with Excel, APIs, and Microsoft Copilot - Improve your GPTs through testing, refinement, and prompt engineering The book includes more than two dozen real GPT projects, complete instruction sets, troubleshooting advice, workflow tips, and practical examples that readers can adapt to their own work. Written in Bill Jelen's trademark conversational style-- with humor, real stories, and plenty of practical advice-- Train Your GPT is designed for business professionals, educators, consultants, content creators, Excel users, and anyone who wants to move beyond basic prompting and unlock the true power of generative AI. If you've ever thought, "ChatGPT is helpful... but I feel like it should be able to do more," this book will show you how. Train your first GPT today, and you'll never look at ChatGPT the same way again.