The Book of General Ignorance was released in the UK a year after "The Book of General Ignorance", on 4 October 2007. An audiobook adaptation called "The Sound of General Ignorance" was scripted and read by the authors on 4 November 2008. On 25 December 2008 an extended version of the book, entitled "The Noticeably Stouter Edition", was published to coincide with "QI" moving to BBC One. This new version included new facts, quotes from the show, a list of all the episodes made at the time, an index, and a new collection of "Four words" from Davies. On 1 November 2007 another "QI" spin-off
What Love Is Made Of three minutes and fifty-five seconds (3:55), "What Love Is Made Of" is an uptempo dance and house track that has been described as "rave-y" and "trance-y". Its instrumentation contains the sounds of pianos and synthesizers. Jordan Sargent of "Spin" observed that it continued the musical style first introduced in Katy's 2012 extended play (EP), "Danger EP", which was "straight-forward house". Idolator's Sam Lansky compared her performance in the song to recording artist Siobhán Donaghy. Critical response to "What Love Is Made Of" was generally positive: most critics noted Katy's vocal performance and commended its sound. Siân Rowe from "NME" was