The QI Book of the Dead diets; and "Is That All There Is?" about people interested in life after death. Ian Wolf for the British Comedy Guide was mostly positive with his review, saying: ""The QI Book of the Dead" is definitely an enjoyable read, and makes for a great gift idea. For one thing, it allows us to look back and learn on the mistakes of our ancestors. Amongst those ancestors are Confucius and Nefertiti, whom everyone in the world is related to... interesting, isn't it!" However, Wolf also wrote that the book made mistakes. He wrote that the book wrongly claimed that Lord Shelburne
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