It's sort of funny that Grant Morrison has found so much success in writing comics. Comics are a medium where readers constantly miss issues, start stories in the middle, or read stories out of order and with month-or-longer gaps between reading. Much of Morrison's work requires the reader read everything start to finish to fully enjoy (and sometimes simply understand) the forces at play in the text. Morrison's (relatively) short and contained pieces like Happy and All-Star Superman are really easy to digest because the mind need only hold onto twelve or less issues worth of material, one or two universes in the multiverse, one or two incantations of the character, minimalist magic.
Morrison's run on Action Comics (vol. 1-3) resembled his Seven Soldiers of Victory more so than his Batman and Son stuff. The narratives all over the place (and time and space and race)- President Superman, people in Superman's brain, Clark Kent in a hoodie (just try it, Zimmerman), Brainiac, ghosts, LOSH. Individually the issues and the trades are enjoyable, but it's really a story you need to read all together. To truly value the role that Krypto plays, you need to listen to the homeless people.
I recommend this book to fans of Superman and wild physics.