The 2nd part of the Imperial Magicians series, with more of the stories with the emperor of The Magicians Universe.
Fred the emperor of the universe in real life not an emperor dealing with real things as a father, a man torn between lives old and new lives and life with his younger self sharing a pregnant wife with his younger self Prince Blake as a rival with his wife and his relationships with his two sons one who hates him Lance and Val who respects him but is his own father not that Val knows it. A problem with time travel, you can be your own grandfather and have yourself as a rival.