How AI Actually Works

Ever wondered how a machine learned to talk? It started with a guessing game.

This friendly, generously illustrated guide opens the box on large language models — no math degree required, just curiosity. Predict the next word, check, adjust, repeat — trillions of times. From that one game, this book builds up the full machinery: tokens and embeddings, the Transformer and attention, how models are trained, and why scale changed everything.

Then it turns practical: the craft of prompting and context engineering, retrieval (RAG), tools, MCP, and AI agents; how to choose a model without the hype; your first API call; and the judgment to use AI responsibly — hallucinations, bias, and privacy included.

With 100+ hand-drawn diagrams, chapter glossaries, a reusable prompt template, cheat sheets, and a full glossary index, this is the beginner's book that treats you like an adult — and leaves the black box open.

Book 1 of the Tech Guides: LLM Series.


“Praise for
How AI Actually Works.


“This is an exceptionally well-designed beginner’s book. The visual pedagogy is excellent, the chapter sequence is logical, and difficult ideas are explained in accessible language.”
— Prasanna Rao, Chief Products & Innovation Officer, Saama Technologies · former IBM Watson Solution Architect


“How AI Actually Works is a clear and approachable introduction to large language models. Praveen does an excellent job breaking down complex concepts into language that both technical and non-technical readers can understand.”
— Mei Lin, Author of AI Project Power & Microsoft MVP


“Complex ideas become remarkably simple in Praveen’s hands. This book is insightful, approachable, and practical — a wonderful guide for anyone who wants to truly understand how AI actually works, without getting lost in the jargon.”
— Rajesh Setty, Entrepreneur, Mentor & Author, Silicon Valley


“AI is rapidly influencing our lives, though how it works remains a mystery to most of us. Praveen Javali explains how AI actually works in an easy-to-understand manner, with plenty of material for the curious reader, the lifelong learner, the silver surfer, the AI developer, or workers who must rapidly gain skills to stay relevant. Full of tips and hints to make AI work more effectively for[…]”

Excerpt From
How AI Actually Works: A Plain-English Guide to Large Language Models (LLMs)
Praveen M. Javali
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