CodeBook is a mobile application that offers a comprehensive collection of over 500 source codes in four popular programming languages: C, C++, Java, and Python. These codes are organized into categories for easy navigation and quick access.Apart from the source codes, the app also features academic projects written in Java and Python, which can serve as helpful references for students and professionals alike. Additionally, CodeBook includes a set of interview questions to help job seekers prepare for technical interviews.CodeBooks unique feature is the integration of ChatGPT, a chatbot powered by OpenAIs GPT-3.5 architecture, which can answer users questions related to programming, computer science, and related topics. With ChatGPT, users can get personalized and real-time assistance, making learning and problem-solving more efficient and effective.Overall, CodeBook is an all-in-one resource for programmers, students, and anyone looking to learn and improve their coding skills.