New book from Get Lost? Wizard World and Mystical journey are my favourites 👀

cannot wait until this novel is voted in. mc is the owner of a bookstore which at night becomes connected to other realms which are in a post apocalyptic state. 3 worlds as of now where the mcs main world with the federal empire seems to be the only one not currently in a post apocalyptic state, the other two are besieged by 'diablos' from the abyss or other ends of the universe/galaxy.