As the commercial landscape for books continues to shift, a prominent literary web site, The Millions, is celebrating its 10th anniversary by getting into the publishing game. On Tuesday, the site unveiled its first e-book, “Epic Fail: Bad Art, Viral Fame, and the History of the Worst Thing Ever,” by Mark O’Connell. The book is billed as “an exploration of the Internet-era obsession with terrible art — bad YouTube pop songs, Tommy Wiseau’s ‘The Room,’ and that endless stream of ‘Worst Things Ever’ that invades your inboxes, newsfeeds, and Twitter streams.”