Carl Magnus Palm is the author of Bright Lights Dark Shadows: The Real Story of ABBA Stockholm based writer Carl Magnus Palm is recognised as the world's foremost Abba historian. His earlier books include Abba: The Complete Recording Sessions, which was based on extensive interviews with all four Abba members, From Abba to Mamma Mia!, a collaboration with Anders Hanser, photographer and close friend of Abba. Palm was involved in putting together the Abba CD box set Thank You For the Music and has also contributed liner notes to several Abba related CDs most notably the remastered version of the compilation album Abba Gold and the re-issue of Abba's original albums.