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“This is the most comprehensive textbook to date on building LLM applications - all essential topics in an AI Engineer's toolkit."
- Jerry Liu, Co-founder and CEO of LlamaIndex
TL;DR
(UPDATED ON OCTOBER 2024) With amazing feedback from industry leaders, this book is an end-to-end resource for anyone looking to enhance their skills or dive into the world of AI and develop their understanding of Generative AI and Large Language Models (LLMs). It explores various methods to adapt "foundational" LLMs to specific use cases with enhanced accuracy, reliability, and scalability. Written by over 10 people on our Team at Towards AI and curated by experts from Activeloop, LlamaIndex, Mila, and more, it is a roadmap to the tech stack of the future.
The book aims to guide developers through creating LLM products ready for production, leveraging the potential of AI across various industries. It is tailored for readers with an intermediate knowledge of Python.
What's Inside this 470-page Book (Updated October 2024)?
Table of Contents
What Experts Think About The Book
"A truly wonderful resource that develops understanding of LLMs from the ground up, from theory to code and modern frameworks. Grounds your knowledge in research trends and frameworks that develop your intuition around what's coming. Highly recommend."
- Pete Huang, Co-founder of The Neuron
“This book is filled with end-to-end explanations, examples, and comprehensive details. Louis and the Towards AI team have written an essential read for developers who want to expand their AI expertise and apply it to real-world challenges, making it a valuable addition to both personal and professional libraries.”
- Alex Volkov, AI Evangelist at Weights & Biases and Host of ThursdAI news
"This book is the most thorough overview of LLMs I've come across. An excellent primer for newcomers and a valuable reference for experienced practitioners."
- Shaw Talebi, Founder of The Data Entrepreneurs, AI Educator and Advisor
Whether you're looking to enhance your skills or dive into the world of AI for the first time as a programmer or software student, our book is for you. From the basics of LLMs to mastering fine-tuning and RAG for scalable, reliable AI applications, we guide you every step of the way.





Louis-François Bouchard is from Montréal, Canada, and is known as What's AI on YouTube.
He focuses on making AI accessible by sharing and explaining it in simple terms, sharing the new research state and applications for everyone, demystifying the AI “black box” for everyone, and sensitizing people about the risks of using it.
Louis-François recently dropped out of his Ph.D. at Mila/Polytechnique Montréal to focus on his love of education on YouTube and as a co-founder and CTO at Towards AI. He aims to build an industry-relevant skillset for working with AI and popularizing the field.
Generated from the text of customer reviewsAs an experienced developer in the industry I can definitely vouch for this book as it impart easy to follow knowledge with respective examples in its notebook. I will agree that I do have some theoretical understanding on machine learning and its relevant eco system so that helped as well. This book i would say will definitely help an experienced developer who understand how current software development lifecycles and how things are currently done in industry, so that will help associate and learn relatable concepts here as well.
Excellent technical content with clear, practical examples. Perfect balance of theory and hands-on exercises that actually work. As an experienced developer, I found this book incredibly valuable for real-world LLM projects. Already using it as my go-to reference. Highly recommended!
I find it valuable the book spends time addressing the foundation of the item in a short introduction to topics. The actual suctioning is good as a in one place resource. The methods in the book are more traditional and best case with respect to documentation for the libraries. If you have not traditional RAG or LLM patterns -it will only be a starting place.
This book was easy to follow and continues to be a great reference.

This book was easy to follow and continues to be a great reference.
Overall, it is a good tool and resource for my needs. Really helping me right now!

Overall, it is a good tool and resource for my needs. Really helping me right now!
Good theory and practical exercises

Good theory and practical exercises
Back cover of the book was littered with dry glue.
Great
A terrific book that helps you start your journey building LLM Applications!
The book starts with an introduction to LLMs, covering their history, evolution, and how they work. Explaining concepts like the Transformers Architecture, Emergent abilities, Context Windows in the initial pages to then move into more advanced topics like Prompting Engineering, Retrieval Augmented Generation (RAG) to mention some.
Throughout the book, practical examples and tutorials are provided using Google Colab Notebooks. These examples allow readers to apply the concepts and techniques learned in real-world scenarios.
Pros:
- Comprehensive overview of the essential technologies and techniques for building LLM applications.
- Practical approach, offering numerous code examples making it easier to grasp the concepts and apply them in projects.
- Welcoming writing style. Despite covering complex topics, the book is written in an accessible and engaging style, making it easy to follow and understand even for readers without a strong background in AI.
Cons:
- Assumes Python Knowledge: This could be a barrier for readers who are new to programming, but again one must put an effort to learn python as is the primary language to execute code for AI.
Overall “Building LLMs for Production” is a highly valuable resource for anyone interested in leveraging the power of LLMs to build real-world applications. The book provides a comprehensive and practical guide, from understanding the fundamentals to deployment. The book's clear explanations and practical examples make it a must-read for anyone looking to enter this exciting field.



A terrific book that helps you start your journey building LLM Applications!
The book starts with an introduction to LLMs, covering their history, evolution, and how they work. Explaining concepts like the Transformers Architecture, Emergent abilities, Context Windows in the initial pages to then move into more advanced topics like Prompting Engineering, Retrieval Augmented Generation (RAG) to mention some.
Throughout the book, practical examples and tutorials are provided using Google Colab Notebooks. These examples allow readers to apply the concepts and techniques learned in real-world scenarios.
Pros:
- Comprehensive overview of the essential technologies and techniques for building LLM applications.
- Practical approach, offering numerous code examples making it easier to grasp the concepts and apply them in projects.
- Welcoming writing style. Despite covering complex topics, the book is written in an accessible and engaging style, making it easy to follow and understand even for readers without a strong background in AI.
Cons:
- Assumes Python Knowledge: This could be a barrier for readers who are new to programming, but again one must put an effort to learn python as is the primary language to execute code for AI.
Overall “Building LLMs for Production” is a highly valuable resource for anyone interested in leveraging the power of LLMs to build real-world applications. The book provides a comprehensive and practical guide, from understanding the fundamentals to deployment. The book's clear explanations and practical examples make it a must-read for anyone looking to enter this exciting field.
I am a Product Manager that has worked in Data & AI teams with a strong scientific background, but no substantial experience in professional development/code. I bought this book on Kindle in June 2024, mainly because I wanted to gain confidence in understanding any LLM related topic, especially in a professional context.
I am happy to testify that reading the book did the job: I am obviously still not an expert in a technical sense, but I can confirm that a lot of topics discussed in teams working on LLMs revolve around the ones mentioned in the book and I feel confident disucussing/challenging them with the team. The book will not necessarily provide the actual answer to one's given problem, but it provides all they need to understand the stakes at the right level, and to find a solution.
Like any learning book it takes time and effort to finish it if you go with the linear way: I believe it took me around 30-40h of actual work, including taking notes. However I was convinced by the timeliness of the concepts mentioned in the book and I still currently perceive it as a great investment with a good benefits/effort ratio.
In a nutshell I do recommend the book for anyone interested in understanding LLMs and their lifecycles in a concrete manner.
This book is a wonderful resource for building LLMs. Well structured with code to practice as well
An excellent resource for understanding and deploying large language models in production. Clear explanations and practical examples make it a must-read for AI practitioners.

An excellent resource for understanding and deploying large language models in production. Clear explanations and practical examples make it a must-read for AI practitioners.
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