https://www.techdirt.com/articles/20181116/09512441065/daily-deal-ultimate-raspberry-pi-ebook-bundle.shtml

The Ultimate Raspberry Pi eBook Bundle will help you unlock the true potential of your Raspberry Pi. You'll learn how to make motion detectors, how to create 3D worlds by using the Raspberry Pi's powerful GPU, how to quickly assemble and operate a Pi 3 supercomputer in the shortest possible time, and much more. The bundle is on sale for $19.99

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