My favourite book when I was a teen was Bloodtide by Melvin Burgess. It an imagining of the Icelandic Volsunga Saga (so lots of Norse gods and myths) but set in post apocalyptic London controlled by ganglords.
I think my overall favourite it probably Shogun by James Clavell - people are probably more familiar with it now because of the recent TV series but the book is huge and goes into huge amounts of depth along with a gradual shift in focus and character as you migrate from being thrown into this alien society with strict but unclear rules to large scale political outmanoeuvres
Right now I'm reading Her Majesty's Royal Covern by Juno Dawson - about milennial witches operating in secret in modern society (think nature, earth, pagan witches, not the ones from the series that must not be named). Written by a trans woman with trans topics in the plot.
I also want to read a new series I only discovered a day or two ago called Custodians by Dan Alexander. I don't actually know a huge amount about it other than it is a detective mystery that involves magic and queer representation. I only mention it as, in a bizarre chain of events, I met and spoke to the author and the actors involved in the audiobook and tv pilot.
