The Order of Time

This is a beautifully written book (and read by Benedict Cumberbatch if you opt for the audiobook!), and clearly explains how our concept of time breaks down at extremely large distances and at the edges of physical reality. Rovelli makes these mind-bending concepts accessible with analogies and careful explanations, but if you're like me you'll probably have to noodle a bit on things like how the perspective of atom-based entities will necessarily perceive entropy increasing only from our particular blurred perspective of the whole of reality. The book would be better off without the fairly unhelpful (and somewhat inaccurate) neuroscience-y chapter, but you can easily skip it. Overall, this is a great book that gives a clear, introductory idea of what time really is in its true essence. Highly recommend.