I read "Foundation" by Asimov, to be more specific, this book. It was simply very good. The author brilliantly introduced the idea of history as an objective process, using beautiful and illustrative examples. It is extremely interesting to watch the development of such a history from the future; everything is intricately woven. I should continue reading the series, but for now, I've switched to something else.
"The Dark Materials" by Philip Pullman. The first book was great, recommended by Heroist, after watching the movie "The Golden Compass." In fact, it's better (in my opinion) than the movie, in which some moments were unsuccessfully distorted and logically spoiled. It looked like a wonderful fairy tale, and I was somewhat puzzled as to why Pullman's works have a bad reputation among the Catholic Church. But as I read the second book, everything became clear to me. A beautiful, somewhat unsettling, and sad, but still fairy-tale story gradually turned into some strange and illogical satire on the biblical plot, and the main characters found themselves in the middle of some kind of theater of the absurd, in which the actors seemed to be playing patients from a mental hospital. I still finished the second and then the third book, hoping until the very end that there would be a deeper meaning in all this story that would resolve all the emerging "What the heck?" questions, but that didn't happen.
In short, of all the books, I think it's worth reading the first one.