Handbooks

Free handbooks for every topic you're learning.

Structured, chaptered guides with hands-on lessons, real projects and interview-ready knowledge.

beginner

AI for Developers

Learn Generative AI and Agentic AI, including LLMs, RAG, AI agents, MCP, and modern AI systems.

Updated 5 Sept 2026Start handbook

beginner

System Design

Learn System Design step by step with easy-to-understand tutorials. Explore HLD, LLD, scalability, databases, caching, distributed systems, microservices, and real-world System Design interview concepts.

Updated 5 Sept 2026Start handbook

beginner

Spring Boot Handbook

Spring Boot is a Java-based framework that helps developers build production-ready applications quickly without worrying about complex configurations.

Updated 5 Sept 2026Start handbook

beginner

Core Java Tutorials

Master Core Java with our beginner-friendly tutorial series. Learn Java fundamentals, OOP concepts, collections, multithreading, exception handling, and JDBC — all explained with simple examples and real-world projects. Perfect for students, developers, and anyone starting their Java journey.

Updated 23 Jun 2026Start handbook

beginner

JavaScript Tutorial

Welcome to JavaScript! This simple and practical guide—our JavaScript Handbook—explains what JavaScript is, how to set it up, and how to start coding. Perfect for beginners, it uses easy examples to help you build interactive and dynamic websites.

Updated 5 Sept 2026Start handbook

beginner

React Handbook

Master React in 2025 with our complete React Handbook! From beginner to advanced topics, explore essential interview questions, expert answers, and tips to excel in React development and interviews.

Updated 5 Sept 2026Start handbook

beginner

HTML5 Handbook

HTML (HyperText Markup Language) is the standard language used to create and structure web pages. HTML is the backbone of every website that tells the browser what content to show and how it should be arranged.

Updated 5 Sept 2026Start handbook

beginner

CSS Handbook

Learn CSS step by step with our comprehensive CSS Handbook for Beginners. Understand layouts, styling, selectors, flexbox, grid, and more with easy examples. Updated for 2025.

Updated 5 Sept 2026Start handbook