
Language AI Handbook
Start with classical NLP, then work through transformers, LLM training, evaluation, and production
The book spans 20 volumes. Read in order, or browse the contents to find the topic you need.
Read Language AI Handbook free online
The Language AI Handbook connects the pieces of modern language AI. We begin with classical NLP, build up to transformers and LLM training, then cover retrieval, evaluation, safety, and production deployment.
Explore the book’s 20 volumes
Language AI Handbook is organised into 20 volumes, plus an appendix. Each volume covers a subject, divided into parts and chapters. Read from the beginning, or choose the volume you need.
418 published chapters · Free to read online
Volume 1Language Data and Classical NLP3 parts · 18 chaptersBuy this volumeBuy PDF · $24
Part I
Text as Data
5 chaptersPart II
Classical Text Representations
9 chaptersPart III
Distributional Semantics
4 chaptersVolume 2Embeddings, Tokenization, and Sequence Labeling3 parts · 25 chaptersBuy this volumeBuy PDF · $24
Part IV
Word Embeddings
9 chaptersPart V
Subword Tokenization
8 chaptersPart VI
Sequence Labeling
8 chaptersVolume 3Linguistic Structure and Meaning2 parts · 11 chapters
Part VII
Linguistic Form: Morphology and Syntax
5 chaptersPart VIII
Semantics and Information Extraction
6 chaptersVolume 4Neural NLP and Sequence Models3 parts · 29 chaptersBuy this volumeBuy PDF · $24
Part X
Neural Network Foundations
13 chaptersPart XI
Recurrent Neural Networks
9 chaptersPart XII
Sequence-to-Sequence
7 chaptersVolume 5Transformers from First Principles4 parts · 27 chaptersBuy this volumeBuy PDF · $24
Part XIII
Self-Attention
6 chaptersPart XIV
Positional Encoding
7 chaptersPart XV
Transformer Blocks
8 chaptersPart XVI
Transformer Architectures
6 chaptersVolume 6Efficient, Long-Context, and Alternative Architectures2 parts · 16 chaptersBuy this volumeBuy PDF · $24
Part XVII
Efficient Attention
9 chaptersPart XVIII
Long Context
7 chaptersVolume 7Pre-training Data and Scaling3 parts · 24 chaptersBuy this volumeBuy PDF · $24
Part XX
Data Curation
10 chaptersPart XXII
Pre-training Objectives
7 chaptersPart XXIII
Scaling Laws
7 chaptersVolume 8Encoder, Multilingual, and Translation Models2 parts · 14 chaptersBuy this volumeBuy PDF · $24
Part XXIV
BERT and Variants
8 chaptersPart XXV
Encoder-Decoder Models
6 chaptersVolume 9Decoder Language Models and Capabilities3 parts · 23 chaptersBuy this volumeBuy PDF · $24
Part XXVIII
GPT Architecture
10 chaptersPart XXIX
Modern Decoder Models
7 chaptersPart XXX
Emergent Capabilities
6 chaptersVolume 10Large-Scale Training and Sparse Models3 parts · 29 chaptersBuy this volumeBuy PDF · $24
Part XXXI
Training Infrastructure
11 chaptersPart XXXII
Training Optimization
8 chaptersPart XXXIII
Mixture of Experts
10 chaptersVolume 11Fine-tuning and Efficient Adaptation3 parts · 23 chaptersBuy this volumeBuy PDF · $24
Part XXXIV
Fine-tuning Fundamentals
5 chaptersPart XXXV
Parameter-Efficient Fine-tuning
12 chaptersPart XXXVI
Instruction Tuning
6 chaptersVolume 12Alignment, Preferences, and Oversight1 part · 16 chaptersBuy this volumeBuy PDF · $24
Part XXXVII
Alignment and RLHF
16 chaptersVolume 13Reasoning and Verifiable Learning1 part · 7 chaptersBuy this volumeBuy PDF · $24
Part XXXIX
Reasoning
7 chaptersVolume 14Efficient Inference and On-Device Models2 parts · 20 chaptersBuy this volumeBuy PDF · $24
Part XLI
Model Compression
6 chaptersPart XLII
Inference Optimization
14 chaptersVolume 15Retrieval, Knowledge, and Memory2 parts · 19 chaptersBuy this volumeBuy PDF · $24
Part XLIV
Retrieval-Augmented Generation
14 chaptersPart XLVI
Continual Learning
5 chaptersVolume 16Agents and AI Coding Systems2 parts · 16 chaptersBuy this volumeBuy PDF · $24
Part XLVII
Code Generation
6 chaptersPart XLVIII
Tool Use and Agents
10 chaptersVolume 17Speech, Multimodal, and Embodied Language2 parts · 17 chaptersBuy this volumeBuy PDF · $24
Part L
Multimodal Models
12 chaptersPart LI
Speech and Audio
5 chaptersVolume 18Evaluation, Factuality, and Reliability4 parts · 30 chaptersBuy this volumeBuy PDF · $24
Part LIII
Evaluation Fundamentals
10 chaptersPart LIV
Benchmark Evaluation
8 chaptersPart LV
Human and Model Evaluation
6 chaptersPart LVI
Hallucination and Factuality
6 chaptersVolume 19Responsible, Secure, and Interpretable Language AI3 parts · 24 chaptersBuy this volumeBuy PDF · $24
Part LVIII
Bias and Fairness
5 chaptersPart LIX
Interpretability
11 chaptersPart LX
Safety and Security
8 chaptersVolume 20Applications, Production, and Compound AI Systems2 parts · 16 chaptersBuy this volumeBuy PDF · $24
Part LXIII
LLM Applications
7 chaptersPart LXV
Production Systems
9 chaptersAppendixState of Language AI 20252 parts · 14 chapters
Part LXVI
Frontier Methods of 2025
8 chaptersPart LXVII
Frontier Outlook from 2025
6 chaptersMore about the book
Begin with the fundamentals that never go out of style: tokenization, embeddings, and the statistical foundations that inform modern approaches. Then dive deep into the transformer architecture. Learn not just how to use it, but how it actually works. Understand self-attention mathematically, grasp why positional encodings matter, and see how architectural choices like layer normalization affect training dynamics.
The landscape of pretrained models can be overwhelming. BERT, GPT, T5, LLaMA, Claude: what are the real differences? When should you use an encoder versus a decoder? How do you actually fine-tune a model for your use case? This handbook cuts through the confusion with clear explanations of each architecture family, their strengths and weaknesses, and practical guidance on selection and adaptation.
From retrieval-augmented generation to RLHF alignment, from efficient inference to safety considerations, every topic a modern NLP practitioner needs is covered with the depth that lets you actually apply it. Whether you're building production systems, conducting research, or simply want to truly understand the technology reshaping our world, this is your comprehensive guide to language AI.
The whole growing library, yours forever.
All 393 written chapters across 19 available volumes
19 written volume PDFs plus the Volume 3 placeholder. Files are delivered separately.
All future expansions, updates, and errata, free, forever
Every future volume included, including 95 planned chapters
Downloadable editions for durable offline reading
$199
instead of $456 for the 19 available volume PDFs bought separately

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Reader verdict
5.0
out of 5
12 five-star reader reviews
Genuine feedback, with names abbreviated for privacy.
Meet the community“Really appreciate the way you have explained the concepts. Simple to understand, yet builds up knowledge exponentially, all while reinforcing it with examples repeatedly. I've read the last two chapters `74.Self-attention & 75.Q,K,V` and I've to admit, my concepts have never been clearer. You really are doing an amazing job breaking down maths and complex concepts like a story!”
“I would like to thank you for your work. Specifically, the chapter: 'LIME Explainability: Complete Guide to Local Interpretable Model-Agnostic Explanations' was extremely helpful for me in understanding LIME and communicating to colleagues. Your work is inspiring and valuable. Thank you for doing it.”
“I am enjoying reading your writings. I appreciate the effort you put into it. I want to drop a note of thanks. Thank you!”
“Your writing feels like a treasure trove of great material. So, thank you for compiling everything on your website!”
“I found your book Language AI Handbook's explanations of Transformer architectures and production deployment strategies to be exceptionally clear and insightful”
“Thanks so much for establishing such an amazing community. I appreciate the opportunity to be a learner and a contributor to the community.”
“Thank you Michael. It's top!”
“I came across your collection of online handbooks covering quantitative finance, AI, and machine learning. I wanted to reach out and thank you for making such high-quality material openly available. They are incredibly helpful for my CFA Level II review and for brushing up ahead of ML interviews.”
“I came across one of your books, Language AI Handbook, and man, I'm loving it. I've read many books but have never found such a comprehensive book on large models that covers everything from start to finish with such depth.”
“I just came across your website where your books are available for free to read. Thank you so much for making this available to the public. This will help a lot of people.”
“Thanks for putting cool stuff out into the world.”
“I read a few of your blogs on NLP and oh WOW, they really are something, now I exactly know how all of the terms Entropy, Cross-entropy and how it is connected to Perplexity, will definitely read more of your blogs.”
Read all 12 reader reviews
“I would like to thank you for your work. Specifically, the chapter: 'LIME Explainability: Complete Guide to Local Interpretable Model-Agnostic Explanations' was extremely helpful for me in understanding LIME and communicating to colleagues. Your work is inspiring and valuable. Thank you for doing it.”
“Really appreciate the way you have explained the concepts. Simple to understand, yet builds up knowledge exponentially, all while reinforcing it with examples repeatedly. I've read the last two chapters `74.Self-attention & 75.Q,K,V` and I've to admit, my concepts have never been clearer. You really are doing an amazing job breaking down maths and complex concepts like a story!”
“Thanks so much for establishing such an amazing community. I appreciate the opportunity to be a learner and a contributor to the community.”
“I just came across your website where your books are available for free to read. Thank you so much for making this available to the public. This will help a lot of people.”
“I am enjoying reading your writings. I appreciate the effort you put into it. I want to drop a note of thanks. Thank you!”
“Thank you Michael. It's top!”
“Thanks for putting cool stuff out into the world.”
“I found your book Language AI Handbook's explanations of Transformer architectures and production deployment strategies to be exceptionally clear and insightful”
“Your writing feels like a treasure trove of great material. So, thank you for compiling everything on your website!”
“I came across your collection of online handbooks covering quantitative finance, AI, and machine learning. I wanted to reach out and thank you for making such high-quality material openly available. They are incredibly helpful for my CFA Level II review and for brushing up ahead of ML interviews.”
“I read a few of your blogs on NLP and oh WOW, they really are something, now I exactly know how all of the terms Entropy, Cross-entropy and how it is connected to Perplexity, will definitely read more of your blogs.”
“I came across one of your books, Language AI Handbook, and man, I'm loving it. I've read many books but have never found such a comprehensive book on large models that covers everything from start to finish with such depth.”
Author and edition details
About the author and this edition

Michael Brenndoerfer
Michael has spent more than a decade working across software engineering, data, AI, and business. He writes to understand difficult ideas more deeply and to share what he learns in a clear, practical way.
- Edition
- First edition
- Published
- Last reviewed
Version history
Kept current, not frozen in time
Library access includes every future volume and update. When a volume changes, its updated PDF appears in My books at no extra cost.
Current release
Edition 2026.08.0
Initial volume-library release with 19 written PDFs, a Volume 3 placeholder, and no combined edition.
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