I can't recommend this book enough. I read it around 9th grade and I've never looked at computers the same. It gives the reader confidence in understanding how these magical machines work from top to bottom. I am seriously emphatic about this book whenever friends ask about how computers work in the slightest. I'm so glad to see it frontpaging HN because of what this book taught me; I hope others will see it here and find it as great as I did