There's some old Asimov "Big Book of Science" sort of book I've got hanging around somewhere (dude definitely had aides/ghost-writers on some of that non-fic, right? Surely? At least researching and first-drafting for him to come through and punch up? Especially the more generic ones like that? I don't see how he'd have had the time to physically write that many words, otherwise, let alone also think about the words, considering his total output) that features the idea of nukes-as-tools pretty heavily, especially for canal digging and excavation generally.

He cranked out a ton of books. I'd believe it was just him, especially with his plain-English style.