https://fullsteamahead365.com/2020/07/20/pay-what-you-want-for-books-like-the-official-raspberry-pi-projects-book-the-official-raspberry-pi-beginners-guide-build-a-retro-games-console-the-magpi-more/
Pay what you want for books like The Official Raspberry Pi Projects Book, The Official Raspberry Pi Beginner's Guide, Build a retro games console: The MagPi, & more