"Sensible to be careful with space. It's not like you're going to run out of things. If you want to read about the bluestream, try looking for Why Blue? An Overview of Magic's Biggest Questions. A bit rambly and philosophical, but otherwise a good introductory theory text. For fiction I'd recommend the Ace's Tail series. Ace is a wandering adventurer who rights wrongs where he finds them. They're a bit two-dimensional, but I like them."