Foundryside (The Founders Trilogy, #1)

by Robert Jackson Bennett

Finally they came to their destination. Up ahead, the wet, rambling rookeries of Foundryside came to a sharp stop at a tall, smooth white wall, about sixty feet high, clean and perfect and unblemished. <We’re coming up on something big and scrived, aren’t we?> said Clef. <How can you tell?> <I just can.>

Clef is essentially a classic bad trope: the hacker talking to the hero through an earpiece. It’s that, plus magic, plus Bugs Bunny, in essence.