Looks like that could be the case, yes. Maybe his publishers changed their minds. I know he and Charlie Stross had great difficulty getting Charlie's publishers to agree to a free ebook of Rapture of the Nerds.
It looks like there was briefly a giveaway of Walkaway and as a result it's on the Internet Archive, but I've not checked it.
It looks like there was briefly a giveaway of Walkaway and as a result it's on the Internet Archive, but I've not checked it.