Prior to Cobain's death, Michael Azerrad published ', a book chronicling Nirvana's career from its beginning, as well as the personal histories of the band members. The book explored Cobain's drug addiction, as well as the countless controversies surrounding the band. After Cobain's death, Azerrad republished the book to include a final chapter discussing the last year of Cobain's life. The book is notable, as it involved the band members themselves, who provided interviews and personal information to Azerrad specifically for the book. In 2006, Azerrad's taped conversations with Cobain were transformed into a documentary about Cobain, titled '. Though this film does not feature any music by Nirvana, it has songs by the artists that inspired Cobain.