I hugely recommend reading Peter Brannen's The Story of CO2 Is the Story of Everything. I picked it up thinking it'd be a good book about climate change—it is—but it's so much more. It's an excellent journey through our planet's (bio)geochemistry, and really gives you a sense for the power and scope of CO2 over millions and billions of years. Snowball earth features prominently, and there are some really fascinating history and consequences of them.