I’ve put a lot of thought into what makes a series. For many writers, it’s the continuation of one story. For others, like me, it’s more than one story that share a common theme. Like the ‘legends’ trilogy. A legend that happens to be true is the only commonality they share. The only one. The stories aren’t similar, the characters are varied, even the legends themselves aren’t similar. One is a Native American legend that I made up, one was plucked from Greek mythology and one is simply a legend I think should exist but doesn’t. That’s Wolf Legend. There should be legends about huge wolves.