Dag Hammarskjöld's White Book: The Meaning of Markings is an analysis by Gustaf Aulén of Hammarskjöld's spiritual diary, Markings (originally Vägmärken or 'Waymarks'). The 'White Book' title comes from Hammarskjöld's own description of his private journal as 'a sort of white book concerning my negotiations with myself and with God', a profound and private record of his spiritual journey, doubts, and inner struggles.