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Free books

Two compendiums, free to download and reuse.

Thousands of pages on AI and solution architecture by Praveen T N, published by diomgis under CC BY 4.0. Read them, share them, adapt them and use them in your own teaching or work, commercial or not, as long as you credit the source.

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diomgis edition, November 2026

Cover of The Machine Intelligence Compendium

The Machine Intelligence Compendium

From Mathematical Foundations to Production Language Systems

  • 9,248 pages
  • 246 chapters
  • 27 parts

The machine intelligence stack from the mathematics underneath it to the systems built on top of it: linear algebra, probability and information theory; neural network mechanics; the transformer in detail; pre-training, fine-tuning and alignment; reinforcement learning; inference, serving and accelerators; retrieval, prompting and agents; reasoning models, evaluation and safety. Every chapter ends with review questions, and the studies in depth take one system or failure mode at a time.

1,164 concepts · 12,029 review questions · 145 studies in depth · 101 tracks

Prefer to read on the web? The living edition is at praveentn.live/learn.

Cover of The Solution Architect’s Compendium

The Solution Architect’s Compendium

Practice, Patterns and Judgement Across the Enterprise Estate

  • 24,470 pages
  • 208 chapters
  • 15 parts

The estate a solution architect is accountable for: the fundamentals and patterns of the discipline, distributed systems and the data they disagree about, cloud, networking, security, reliability, operations, cost and governance. Every topic gives its defining entries, scenario studies that resolve into a decision, and a rapid-review set. The book closes with worked architectures reproduced as delivered and field guides built from published evidence.

600 topics · 2,513 entries · 3,294 scenario studies · 6,558 review questions · 55 deliverables

Prefer to read on the web? The living edition is at praveentn.live/architecture.

Read the living edition online

Both books are printed from a working library that keeps growing. It lives at the author's own site, praveentn.live, where it is updated continuously: every concept and topic, searchable, with flashcard decks, quizzes, the worked architectures and the field guides.

Learn it live

Many chapters end with the diomgis course that teaches that material in a small live cohort, with labs, practice and mentors. Each course page lists the chapters it builds on.

Licence

Both books are licensed under the Creative Commons Attribution 4.0 International licence (CC BY 4.0). You may copy, share and adapt them for any purpose, including commercially. Give appropriate credit: the title, the author, a link to this page and the licence, and say if you changed anything.

Quotations, data and names belonging to others remain theirs; the licence covers the author's own text and figures.

How to cite

The Machine Intelligence Compendium
APA
Praveen T N. (2026). The Machine Intelligence Compendium: From Mathematical Foundations to Production Language Systems (diomgis edition). diomgis. https://diomgis.com/books
Chicago-style note
Praveen T N, The Machine Intelligence Compendium: From Mathematical Foundations to Production Language Systems, diomgis edition (Bengaluru: diomgis, November 2026), https://diomgis.com/books. Licensed under CC BY 4.0.
BibTeX
@book{praveentn2026tmic,
  author    = {{Praveen T N}},
  title     = {The Machine Intelligence Compendium: From Mathematical Foundations to Production Language Systems},
  edition   = {diomgis edition},
  publisher = {diomgis},
  address   = {Bengaluru, India},
  year      = {2026},
  month     = nov,
  url       = {https://diomgis.com/books},
  note      = {Licensed under CC BY 4.0}
}
Credit when you reuse it
Adapted from The Machine Intelligence Compendium by Praveen T N (diomgis, 2026), https://diomgis.com/books, licensed under CC BY 4.0.
The Solution Architect’s Compendium
APA
Praveen T N. (2026). The Solution Architect’s Compendium: Practice, Patterns and Judgement Across the Enterprise Estate (diomgis edition). diomgis. https://diomgis.com/books
Chicago-style note
Praveen T N, The Solution Architect’s Compendium: Practice, Patterns and Judgement Across the Enterprise Estate, diomgis edition (Bengaluru: diomgis, November 2026), https://diomgis.com/books. Licensed under CC BY 4.0.
BibTeX
@book{praveentn2026tsac,
  author    = {{Praveen T N}},
  title     = {The Solution Architect’s Compendium: Practice, Patterns and Judgement Across the Enterprise Estate},
  edition   = {diomgis edition},
  publisher = {diomgis},
  address   = {Bengaluru, India},
  year      = {2026},
  month     = nov,
  url       = {https://diomgis.com/books},
  note      = {Licensed under CC BY 4.0}
}
Credit when you reuse it
Adapted from The Solution Architect’s Compendium by Praveen T N (diomgis, 2026), https://diomgis.com/books, licensed under CC BY 4.0.