I recently read Aimless Witch by Shannon Mayer. It's about a young witch who is somehow responsible for turning the world into an apocalyptic wasteland (but it's not fully explained how). She hides her magic and joins a caravan of humans trying to find a safe refuge. The whole world is incredibly bleak (Mad-Maxish), but intriguing. I found the wandering aimlessly thing a bit much at times (although it wasn't a surprise, since it's in the title), but the characters were likable and interesting, so they carried the story. An enjoyable read, overall!