I know I know it's basically the same thing... but better!? Ha! Let me know your ideas for Book 2's cover art concept if you're so inclined! Reminder of the stuff I was thinking:
Cal at his lab workbench, back to the viewer, hand doing magic things next to a bubbling cauldron, while his other hand draws runes with Mana into the air next to him. Could maybe even splurge to get Selara and Aurelian in the background (I think the artist charges by character)?
Cal facing off with the elite rotter/vorlag serpent/Narbok/Cillian
Cal watching Selara fight the red drake/Angelika nuke the dungeon
Cal standing on the waterfall overlooking the Rootbound Depths/standing at the dungeon core cavern entrance overlooking the core and monsters (similar vibe to Book 1)