At the very tail end of last year, reports emerged that Upton Sinclair had discovered Sacco and Vanzetti were guilty. Now Sinclair biographer Kevin Mattson has some advice regarding the way commentators, especially conservatives, have made hoopla over Sinclair’s alleged cover-up: Don’t believe the hype. Mattson’s Chronicle of Higher Education essay points out that Sinclair scholars have known about the author’s ambivalence over the murder trial for a long time now, and anybody who’s actually read the novel he wrote about it, Boston, can see how deep his ambivalence ran.