This CircuitPython book is great for beginners. To use it, start reading from the beginning to learn about CircuitPython with Circuit Playground Express. Remember, it's all in Japanese, so you'll need to be comfortable with the language. When you get the book, look for the kawaii card inside. Scan the QR code on it using your device and enter the password to download the .pdf version. Keep the card in a safe place so you don't lose access to the digital copy. There's no special maintenance for the book, just store it in a dry place to prevent damage. Enjoy exploring the world of CircuitPython with this book!