“Anathem” is another science fiction book by Neal Stephenson. I would say that it is hard science fiction, since it is about parallel universes (multiverse), quantum mechanics, mathematics and philosophy. The author tries to teach his readers a bit along the way with varying success.
The story is about avouts in a parallel Earth. These are scientific monks, who are not allowed by law to use any technology, because of the perceived danger thereof. Three pogroms in the past have made avouts very careful when dealing with the outside world.
Once every decade, some parts of the Concent where avouts live are opened to the public. This event coincides with mysterious changes, that influence the whole planet. And without spoiling it for you, I can tell you that a lot of violence and adventure follows.
If you are even remotely interested in mathematics, science or philosophy, this is the book for you. Neal Stephenson refers to different scientific and philosophical concepts throughout the novel. He also makes some science jokes, but they are hard to get. At least they were for me. His take on parallel worlds is pretty interesting. According to him, for instance, it might be impossible to eat the food on a parallel Earth due to differences in biochemistry.
If you are not interested in science and technology, then this is absolutely the wrong book for you.
This is another book that will take a lot of your time depending on how fast you read. Its portability is also not optimal.
If you are not into the topics covered by Anathem, you are probably on the wrong blog anyway, so yes I would recommend this book to you.