I've been doing this hobby for a while now, and I have read a good number of books on the subject along with that. I've gone through Nightwatch, Backyard Astronomers' Guide (both Dickinson), Atlas of the Universe (Moore), and a number of other introductory books, but the material in these books is starting to sound the same. Additionally, I've read a few books on the astrophysics behind the hobby just to get an idea of things work, but these books have only been introductory. Although I enjoy Neil Tyson, Carl Sagan, and some of these other writers, I no longer learn as much from reading their books. Now, I've been looking for more 'intermediate' astronomy books to learn a bit more about the science and history of the hobby. The people in this hobby always seem to find great reading material, and I was curious about what you would recommend I read/do to continue learning about astronomy, but on a deeper level.