# The Rig Book > A comprehensive playbook for building AI agents in Rust using the Rig framework. ## About The Rig Book is the official documentation and playbook for Rig, a Rust library for building LLM-powered applications and AI agents. It covers everything from basic API calls to advanced patterns like RAG, tool calling, and multi-agent systems. ## Sections - [Introduction](/intro/index.html): Overview of the book and AI agents in Rust - [Making API Calls](/playbook/rig-api-call.html): Basic usage of Rig for LLM API calls - [Tool Calling](/playbook/tool-calling.html): How to implement function/tool calling with agents - [RAG](/playbook/rag.html): Retrieval-Augmented Generation patterns - [Memory](/playbook/memory.html): Implementing conversation memory - [Model Routing](/playbook/model-routing.html): Dynamic model selection strategies - [Dynamic Model Creation](/playbook/dynamic-model-creation.html): Runtime model instantiation - [Multi-Agent Systems](/playbook/multi-agent-systems.html): Orchestrating multiple AI agents - [Observability](/playbook/observability.html): Monitoring and tracing AI applications ## Links - Documentation: https://book.rig.rs - Rig GitHub: https://github.com/0xPlaygrounds/rig - Rig Crates.io: https://crates.io/crates/rig-core