This book presents, for the first time, the unpublished manuscripts of Lars H?rmander, written between 1951 and 2007. H?rmander himself organised the manuscripts and also wrote the notes explaining their origins, presenting the material in the form he fully intended it to be published in. As his daughter, Sofia Brostr?m, mentions in the Foreword, towards the end of his life, H?rmander "carefully went through his unpublished manuscripts, checking...