Question: Which member of metal band Cradle of Filth wrote a book documenting the history of the band?
Context: The Principle of Evil Made Flesh is the debut studio album by English extreme metal band Cradle of Filth.  It was released on 24 February 1994 through Cacophonous Records, following three demos released between 1991 and 1993.  The album's sound is significantly more raw than on subsequent releases, and frontman Dani Filth's vocals differ from his later style and technique.  The album is a then-unusual hybrid of gothic metal and black metal.  This would be the only album featuring guitarist Paul Ryan and keyboardist Benjamin Ryan; guitarist Paul Allender also left the band at this point, but returned five years later for "Midian". Devilment are a British heavy metal band originally formed in late 2011.  The band experienced problems finding a stable vocalist until Dani Filth from the extreme metal band Cradle of Filth joined.  They released their first studio album, "The Great And Secret Show", on 3 November 2014. Darkly, Darkly, Venus Aversa is the ninth studio album by English extreme metal band Cradle of Filth.  It was released on 1 November 2010 by record label Peaceville and is a concept album centred on the demon Lilith.  It is Cradle of Filth's's only album to feature keyboardist Ashley Ellyllon, and is also the band's final album with Dave Pybus as their bass player. Damnation and a Day (subtitled From Genesis to Nemesis...) is the fifth studio album by English extreme metal band Cradle of Filth.  It was released on 10 March 2003 and is Cradle of Filth's only album on a major label, Sony Records, after which they transferred to Roadrunner.  It features the forty-piece Budapest Film Orchestra and thirty-two-piece Budapest Film Choir.  The album is partly based on John Milton's epic poem "Paradise Lost". Nymphetamine is the sixth studio album by English extreme metal band Cradle of Filth.  Recorded between February and July 2004, it was released on 28 September by record label Roadrunner.  "Nymphetamine" marks the first recorded appearance of guitarist James McIlroy (as "Germs Warfare") on a Cradle of Filth album.  He would later record guitar for the band's 2010 release "Darkly, Darkly, Venus Aversa".  "Nymphetamine" is also the band's final album to feature keyboardist Martin Powell. Thornography is the seventh studio album by English extreme metal band Cradle of Filth.  It was released on 17 October 2006, by record label Roadrunner.  It was produced by former Anthrax guitarist Rob Caggiano, engineered by Dan Turner and mixed by Andy Sneap, and once again features narration by Doug Bradley (as with "Midian" and "Nymphetamine").  It is Cradle of Filth's second album as a five-piece, as keyboardist Martin Powell left the band in 2005.  This would also be the band's final album to feature drummer Adrian Erlandsson, and the only full-length to feature guitarist Charles Hedger. From the Cradle to Enslave is the second EP by English extreme metal band Cradle of Filth, released on 30 October 1999 by record labels Music for Nations (Europe) and Metal Blade (US). Gian Pyres (born Gianpiero Piras, 20 October 1973) is a British guitarist, best known for his work with extreme metal band Cradle of Filth for which he recorded guitars for "Dusk... and Her Embrace" (1996), "Cruelty and the Beast" (1998), "Midian" (2000), "Bitter Suites to Succubi" (2001) and "Lovecraft & Witch Hearts" (2002).  He appeared on their DVDs "Heavy, Left-Handed and Candid" (2001), "Live Bait for the Dead" (2001) and "Peace Through Superior Firepower" (2005), and appeared in Alex Chandon's "Cradle of Fear" (2001).  In addition he has appeared in music videos for "From the Cradle to Enslave" (1999), "Her Ghost in the Fog" (2000), "Born in a Burial Gown" (2001) and "Scorched Earth Erotica" (2002).  He also appeared with Cradle of Filth on BBC's "Living with the Enemy" (1998). Dani Filth (born Daniel Lloyd Davey) is the lyricist, vocalist and founding member of the metal band Cradle of Filth. The Gospel of Filth: A Bible of Decadence & Darkness (formerly known as "The Gospel of Filth: A Black Metal Bible") is a book by Dani Filth and Gavin Baddeley, documenting the history of the band Cradle of Filth and straying further afield to explore their influences and "lay bare the fascinating underworld of contemporary culture".
Answer: Dani Filth