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A hands-on book for builders

Turn the brain in a jar
into an agent.

Zero to Mastery — Build intelligent agents that reason, use tools, remember, and collaborate.

Observe
Think
Act
Repeat
your-first-agent · a real run
20
Chapters
97k
Words
100+
Code samples
4
Capstones

This is not another prompt-engineering book.

Tweaking prompt wording to coax a slightly better answer is alchemy — it doesn't scale. This book is about building systems that think, decide, and act.

Brain in a jar? Not anymore.

Your LLM is paralyzed without hands. This book gives it hands, memory, and the loop that makes it an agent.

Running code, every chapter

No hand-waving. Every concept is paired with code you can run, break, and fix — from Chapter 1 to the capstones.

Observe → Think → Act

Master the agent loop at the core of every serious system, then scale it to multi-agent crews that collaborate.

Your path to mastery

Nothing is throwaway. Every chapter builds on the last until you have a personal library of agent components you can remix for any project.

  • Build your first agent loop by Chapter 4
  • Wire up tools, memory, and planning by Part II
  • Ship a multi-agent research assistant in Part IV
  • Finish with a coding agent that debugs its own code

Stop reading about agents.
Start building one.

Chapter 4 has a running agent loop. Chapter 11 has agents collaborating. Chapter 20 has an agent that debugs its own code.