Flat Earth News has been reviewed by every broadsheet newspaper and received ample coverage on You & Yours, Thinking Allowed and the Today programme on Radio 4. So rather more coverage than most books. Davies has some fair points, but is largely guilty of the same crimes with which he berates the media - unattribution, selective quoting, post-hoc argument, invalid assumptions and plain prejudice.
As for Icke - yes, he is dead serious. Poor chap.