 She wrote the foreword to his collection ""; he in turn wrote the introduction to "Comic Book Tattoo".Gaiman is godfather to her daughter and a poem written for her birth, "Blueberry Girl", was published as a children's book of the same name in 2009.In 2019, Amos performed the British standard "A Nightingale Sang in Berkeley Square" over the closing credits of Gaiman's TV series "Good Omens", based on the novel of the same name written by Gaiman and Terry Pratchett.