Cross secured unprecedented cooperation from Courtney Love, Kurt’s widow, as well as access to Cobain’s private journals, lyrics, and artwork. While some critics initially feared this access would lead to hagiography, the opposite occurred. Heavier Than Heaven is unflinching. It details Kurt’s childhood struggles with ADHD and bipolar disorder, his parents' divorce, his bouts of homelessness, and the escalating heroin addiction that eventually consumed him.