I'm fond of the "A Very Short Introduction" book series from Oxford University Press. Some very good examples of those include Thomas Pink's on Free Will, Susan Blackmore's on Consciousness, Christopher Janaway's on Schopenhauer, David Weir's on Decadence, Stanley Wells on Shakespeare, and Brad Inwood's on Stoicism.
David MacKay: Sustainable Energy – without the hot air
David MacKay: Information Theory text book
Steven Pinker: How the Mind Works, The Stuff of Thought (Cognitive science, linguistics, philosophy of language)
A distiller (name based on https://distill.pub/) is a writer who can explain a complex topic, one with a lot of research debt, so that knowledgeable undergraduates in the subject can get a good intuition and picture of the subject. I'm looking for examples of people you consider great distillers in a field in which you have advanced knowledge. For example, Terrence Tao is a great distiller of Mathematics, and Scott Aaronson is a great distiller of Complexity Theory and Quantum Computing. What are your favorite distillers, and why?
I'm asking because I'm trying to improve my own distilling skills, and studying/stealing from the masters is a great way to get better. Only issue is that you need to know the masters.