Swedish pop singer. She participated in Let's Dance, in 2006 and finished in second place with dancer David Watson.

Anna is currently hosting the talk show Let's Dance plus on TV4 Plus where the last week's events in the main Let's Dance show are discussed.

She has participated in Melodifestivalen, the contest to select Sweden's entry for the Eurovision Song Contest, a total of four times. At the first Melodifestivalen 2007 semifinal on 3 February in Jönköping, Book's song "Samba Sambero" was the second song announced as a finalist. The song then went on and finished ninth and second last in the final, where it received one point. Her fourth participation would have been in 2016 with the song "Himmel för två" (Sky for Two). However her song was disqualified on 4 February 2016 two days before the semifinal because the song had already participated in the Moldovan national selection for the Eurovision Song Contest 2014.