This biography is good, although it includes some mistakes like any biography. Reading this book is essential to know a little bit of late leader of Nirvana but also advise reading the biography of Michael Azerrad unfortunately sold out in French, to complete the subject. However, a small rant: the French edition of the biography Heavier than heaven includes misspellings, various shells and also suffers from a somewhat shaky translation. Improper editorial work was done and that night reading the book. But I repeat: to read!