QI market. The Official "QI" website notes that it will soon be published in 23 countries. Pocket-sized and audio versions of "General Ignorance" went on sale the following year. In 2008, a newly revised version was published under the title of "The Book of General Ignorance: The Noticeably Stouter Edition". This edition corrected and updated some of the information from the first print, while adding 50 new sections (and extra illustrations) to the original 230. It also included quotes from the series, new "Four Words" by Davies and added a complete episode listing from Series A–F, along with an index. "QI"s
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