Joss Whedon’s award-winning, Internet server-melting, genre-twisting musical tragicomedy now has an official book out today from Titan Books. Hit the jump for all the HORRIBLE details!

Titan Books released DR. HORRIBLE’S SING-ALONG BLOG: THE BOOK today. For those unfamiliar with Whedon’s Internet series, it stars Neil Patrick Harris as Billy, a.k.a. Dr. Horrible, a budding supervillain whose plans for world domination continually go awry. His two goals: getting accepted into the Evil League of Evil, and working up the guts to speak to his laundromat crush Penny (Felicia Day). The only thing standing in his way is Captain Hammer (Nathan Fillion), Billy’s superhero archnemesis. With one big score, Billy could get into the E.L.E. and earn the respect of Penny, but only if he can keep her away from the dashing Captain Hammer...

DR. HORRIBLE’S SING-ALONG BLOG: THE BOOK (tpb, $19.95) was compiled by Whedon and his production team, and the definitive companion features: behind-the-scenes memories from Joss and his fellow writers Jed Whedon, Zack Whedon and Maurissa Tancharoen; exclusive contributions from stars Harris, Fillion, Day and Simon Helberg; the full, uncut shooting script, original handwritten lyrics, costume designs and scores of previously unpublished photos; and the official sheet music.

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