E S
E S asked Rick Riordan:

Hi! I've had this question for a while, but never had the chance to ask! You have expanded the PJO universe so greatly, as well as adding things like Kane Chronicles and Magnus Chase, and all of these series have all intertwined at one point or another, so I must know, how on earth have you avoided plot-holes??? Do you have a chart of some sorts? Is it all mapped out in your head? A journal?

Rick Riordan I try to step around plot holes whenever possible, but sometimes they're too big and I fall in. Oh well. I basically re-read whatever books I need to so I refresh my memory. I also rely on my copy editors to help me catch mistakes. The system works (mostly)!

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