Dire Predictions: The Visual Guide to the Findings of the IPCC by Michael Mann summarizes the IPCC Report on climate change (scientific basis) in a clear and understandable way without sacrificing important detail and nuance.
One test of the legitimacy of claims about scientific matters is time. Over time, if a proposal about how nature works that buck the consensus is valid, it will be shown to be valid. If it is not, it will fail the test of time. Climatology Versus Pseudoscience: Exposing the Failed Predictions of Global Warming Skeptics by Dana Nuccitelli looks at the predictions of those who have been denying the reality of climate change, comparing those predictions made by mainstream science. Read the book to find out who won!
Even though this is not specifically about climate science, I always recommend that people read Sean Otto’s The War on Science: Who’s Waging It, Why It Matters, What We Can Do About It to understand why we are not simply and directly dealing with climate change. Along the same lines, Michael Mann’s The Hockey Stick and the Climate Wars: Dispatches from the Front Lines chronicles the denier-science fight at its high water mark, a few years back.
Drawdown: The Most Comprehensive Plan Ever Proposed to Reverse Global Warming is a pretty good book, and at this moment very current, to read about how to address climate change.