Armchair Apocrypha is American singer-songwriter Andrew Bird's fourth studio album and his third post-Bowl of Fire album. The album features more electric guitars, a change from the more acoustic-oriented Eggs, though the songs are similar in character if slightly more straightforward. "Simple X" is a track started by collaborator Dosh, who supplied the drum track on the final version, with Bird adding lyrics. The track "Imitosis" is an expansion of the song "I" (also called "Capital I" live) on his 2003 album Weather Systems. The song "Darkmatter" is also a rehash of the song "Sweetbreads", which can be found on Read more on Last.fm.