Free programming books, read online.

Full-length technical books for developers — written from production experience, not documentation summaries. Every chapter is a public page: no paywall, no account, no trial. Want a copy to keep? One confirmed email gets you the printable edition.

100% free to readNo signupPrintable copy by email

On the shelf

Advanced SEO Engineer105 pp
JavaScript Core Engineer90 pp
Advanced Automation QA96 pp
React Core Engineer37 pp

328 pages116k wordsFree

Every book drawn to scale by page count. All of it readable in the browser, no signup.

Deepak Kumar publishes 4 free technical books — 44 chapters and roughly 328 printed pages on Advanced SEO, AEO & GEO, JavaScript Core Engineering, Advanced QA Automation / Quality Engineering, React Core Engineering — readable in full at officialdeepak.in/books with no paywall, no account and no trial. Each chapter is an ordinary public web page; a printable single-file copy of any book is available after confirming an email address.

All books

📘advanced
Advanced SEO, AEO & GEO · javascript · Advanced
Advanced SEO Engineer
SEO, AEO, GEO, AI Search, Technical SEO, and Search Visibility Engineering
Advanced SEO Engineer is a practical, technical guide to building search visibility across traditional search engines, answer engines, and AI-powered discovery platforms. Go beyond traditional keyword optimization to understand technical SEO, crawling and indexing, semantic search, structured data, entity optimization, content architecture, AEO, Generative Engine Optimization (GEO), AI search, local search, programmatic SEO, internal linking, authority building, analytics, and search performance engineering. Learn how to design websites and content that can be discovered, understood, cited, and surfaced across Google and emerging AI-driven search experiences. Built for marketers, SEO professionals, developers, founders, and growth engineers who want an advanced, measurable approach to modern search visibility.
What you will learn
- Design an advanced SEO strategy for competitive websites
- Diagnose complex technical SEO problems
- Understand crawling, rendering, indexing, and ranking systems
12 chapters105 pages37,022 words3 hr read0 readers~~₹1,500~~Free
Start reading — free Contents & sample
Jump into a chapter
📘advanced
JavaScript Core Engineering · javascript · Advanced
JavaScript Core Engineer
JavaScript Internals, Runtime Architecture, Asynchronous Programming, Performance, and Advanced Engineering
JavaScript Core Engineer is a deep technical guide for developers who want to understand JavaScript beyond syntax, frameworks, and everyday coding patterns. Go inside the JavaScript execution model to understand how code actually runs—from execution contexts, scope, closures, prototypes, and this to promises, the event loop, microtasks, concurrency, and asynchronous execution. Explore how modern JavaScript engines such as V8 optimize code, manage memory, perform garbage collection, and execute JavaScript at scale. The book connects language concepts with real engineering problems: debugging difficult runtime behavior, identifying memory leaks, improving performance, designing reliable asynchronous systems, and making informed architectural decisions. Designed for experienced JavaScript and TypeScript developers, this book focuses on the why behind JavaScript's behavior, giving you the mental models and engineering knowledge needed to build faster, more reliable, and production-grade JavaScript systems. You won't just learn how to write JavaScript—you'll learn how to think like a JavaScript core engineer.
What you will learn
- Explain how JavaScript code is executed by a runtime
- Understand execution contexts, lexical environments, and scope
- Reason about closures and their memory implications
12 chapters90 pages31,508 words2.5 hr read0 readers~~₹940~~Free
Start reading — free Contents & sample
Jump into a chapter
📘intermediate
Advanced QA Automation / Quality Engineering · typescript · Intermediate
Advanced Automation QA
Modern Test Automation, Framework Architecture, CI/CD, API Testing, and Quality Engineering
Master advanced test automation with Playwright, API testing, scalable frameworks, parallel execution, CI/CD, flaky test prevention, visual testing, and modern quality engineering practices.
What you will learn
- Design scalable automation frameworks from scratch
- Build maintainable Playwright-based test suites
- Architect Page Object and component-based test systems
10 chapters96 pages33,795 words3 hr read0 readers~~₹600~~Free
Start reading — free Contents & sample
Jump into a chapter
📘advanced
React Core Engineering · typescript · Advanced
React Core Engineer
Deep React Internals, Architecture, Performance, and Production Engineering
A practical deep dive into React for engineers who want to move beyond components and hooks. Explore how React actually works under the hood, including rendering, reconciliation, the Virtual DOM, Fiber, hooks, state management, concurrent rendering, Server Components, performance optimization, architecture, debugging, and production patterns. Learn how to reason about React applications like a core engineer—understanding not just how to use React, but why React behaves the way it does and how to build scalable, maintainable, high-performance applications.
What you will learn
- Explain how React rendering and reconciliation actually work
- Understand React Fiber and the rendering pipeline
- Reason about state, props, context, and component updates
10 chapters37 pages13,267 words1 hr read0 readers~~₹450~~Free
Start reading — free Contents & sample
Jump into a chapter

Every book at a glance

Free technical books by Deepak Kumar, with length, level and price.
Book	Subject	Level	Chapters	Pages	Reading time	Price
Advanced SEO Engineer	Advanced SEO, AEO & GEO	Advanced	12	105	3 hr read	~~₹1,500~~Free
JavaScript Core Engineer	JavaScript Core Engineering	Advanced	12	90	2.5 hr read	~~₹940~~Free
Advanced Automation QA	Advanced QA Automation / Quality Engineering	Intermediate	10	96	3 hr read	~~₹600~~Free
React Core Engineer	React Core Engineering	Advanced	10	37	1 hr read	~~₹450~~Free

Questions about these books

Are these programming books really free?

Yes. All 4 books — 44 chapters, about 328 printed pages — are free to read in full on this site. There is no paywall, no trial, no metered limit and nothing to buy. Every chapter is an ordinary public web page.

Do I need to sign up or create an account to read them?

No. Reading requires no account, no email address and no login. An email address is only asked for if you want the whole book as one printable file to keep, and that is optional — the same text is on the site either way.

Can I download a PDF of these books?

Yes. Confirm an email address on any book's page and you get a single printable copy of that book. One confirmation email, one-click unsubscribe on everything after it, and the address is never sold or shared.

What topics do the books cover?

Advanced SEO, AEO & GEO, JavaScript Core Engineering, Advanced QA Automation / Quality Engineering, React Core Engineering. Each book is a full-length treatment of one subject rather than a collection of tutorials — architecture and trade-offs first, with working code examples throughout.

Who writes these books?

Deepak Kumar, Sr Software Engineer — writing from production experience building web and AI systems at scale, not from documentation summaries.

Were these books written with AI?

Drafted by an AI writing pipeline and then reviewed and edited by Deepak Kumar before publication. Every code example is checked by a parser before it ships, and chapters that did not meet the editorial bar were rewritten or held back. We say so plainly rather than leaving you to work it out.

Can I use these books to teach, or share them with my team?

Yes — send anyone the link. Every chapter is a public URL, so nobody you share it with hits a signup wall, and the pages read the same on a phone as on a desktop.

About the author

Deepak Kumar

Sr Software Engineer at India Today Group | Aaj Tak

These books come out of production work — the architectures that held up, the ones that did not, and the reasoning behind both. They are free because the reach is worth more than the cover price.

More about me

Shorter form

The blog covers the same ground in article length — React, Node.js, AI systems and architecture.

Read the blog

Advanced SEO Engineer

JavaScript Core Engineer

Advanced Automation QA

React Core Engineer