I seriously recommend The Luminaries by Eleanor Catton. It's a really long and complex book that is absolutely worth taking your time on and really absorbing every bit of information in. It's set in gold rush New Zealand in the 1860s and you will be transported to this other world that she creates for you. The book does require knowing a bit about astrology, so learn a little before you go in - it will increase your enjoyment of the book a lot. Seriously try this book, you won't regret it.