Bill Gates is co-chair of the Bill & Melinda Gates Foundation

When Bill Gates isn’t convincing the world’s billionaires to give their fortunes away, he’s known to curl up with a good book or ten. For the past several years the philanthropist and Microsoft co-founder has published a year-end list of favorite books on his personal blog, and this year he’s been no less voracious as a reader.

In 2015, Gates found his reading selection oriented toward “how things work”—whether it’s an explanation of how physical processes unfold, or how humans developed our values. Drawing on nonfiction reads published from 2006 to 2015, Gates presents his picks and reviews from this year:

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