Harper and Bacon published the early challenge to Beatty's Jutland

Who wrote the first book debunking Beatty's version of the Battle of Jutland?

John Harper and Reginald Bacon, using Harper's original report and Bacon's forceful criticism of Beatty.

Vice-Admiral John Harper and Admiral Reginald Bacon wrote the first major rebuttal. Harper had written the original report that Beatty's preferred official account altered. Because Harper retained copies, he could publish the substance of his work independently. Bacon added an openly hostile critical voice, making their book a direct historiographical answer to Beatty's narrative.