YA lit is a changeable beast, and storytelling trends come and go like tides. You’ve got your magic schools, your dystopias, your paranormal romances, just to name a few. Furthermore, even when the settings vary wildly, similar themes or plot devices may crop up. For example, I’ve read two different speculative fiction books in which the characters who have magic powers received them as a result of disease. At first I was a little wary of this concept, as pandemic stories that are poorly researched, badly thought out, or not well-written can be a fresh new hell. But both of the books presented stories with interesting conceptions of disease and the limits of magical power.