User blog comment:SayuriDarling/Magnus Chase and the Gods of Asgard Official Discussion/@comment-25044056-20141023194529/@comment-1515612-20141023195303

I don't think it's because he's writing other stories. The guy may get bored writing about something and wanna switch. Also, they are short stories and they are being written in the POV of Percy so I don't think it will be too hard.