All In: Act I: Prelude 2: 52 Days Inbetween Reading Order

An Action Comics arc set in the days after Absolute Power and before the All-In-Saga really gets going. Recommended, as this sets up some of the scene for Superman and the Phantom Zone referred to in Main Act 1. Note: The 12-part Supergirl backup story happens after the 12-part main storyline.