Official releases:

• Come As You Are - The Story of Nirvana (by Michael Azerrad)
• Heavier Than Heaven - The Biography of Kurt Cobain (by Charles R. Cross)
• Kurt Cobain - Journals (published by Penguin Putman / Viking)

Unofficial releases:

• Dark Slivers: Seeing NIRVANA in the Shards of Incesticide (by Nick Soulsby)
• I Found My Friends: The Oral History of NIRVANA (by Nick Soulsby)
• NIRVANA: A Tour Diary (by Andy Bollen)