John McWhorter has quickly become one of my favorite popularizers of research in modern linguistics. He is especially a pleasure to listen to. His new Teaching Company course Language A to Z is out on Audible. I haven't checked it out yet because I'm in the midst of listening to another course, but I can definitely recommend one of his other courses on Audible -- Myths, Lies and Half-truths of Language Usage. And, I plan on checking out Language A to Z in the near future. Check it out at the link above.