Attack of the Wolf King is the fifth studio album from Haste the Day. The album was released on June 29, 2010 through Solid State Records. A song from the album, entitled "Travesty" was released on the band's MySpace on May 4. Lyrics for "Travesty" were released on May 21, 2010 on the band's Facebook. The song "Dog Like Vultures" has been played live since early April and debuted April 8 in Evansville, IN. This is the only album to feature new members, Dave Krysl, Giuseppe Capolupo, and Scotty Whelan. On the CD's release day, the band played a show in Bloomington, IN, where they performed an extended setlist with all the former members of the band, playing songs from the That They May Know You EP through Attack of the Wolf King. On June 8 the band released the song "Wake Up The Sun" on their Myspace.
On August 10, 2010, CI Records released a 7" vinyl single of "Travesty" with two other tracks from the album. The release was limited to 1000 copies on swirl colored vinyl.