I haven’t sent a Digital Millennium Copyright Act notice to any company or individual concerning Confession of an Undercover Internet Troll, a book which the Cabin Boy™ originally insisted he did not write. I did, however, make CreateSpace and Amazon aware that a part of the book on pages 8 and 9 appears to have been copied without permission from a blog post here at Hogewash!. It seems that Amazon has investigated the matter and decided to discontinue selling the book. That was their business decision.
Since I haven’t made a DMCA claim, I don’t believe that any DMCA counternotice provisions apply to Amazon’s decision. Perhaps the Cabin Boy™ should seek competent legal advice from an attorney who specializes in intellectual property law.