Heaven was written in 1994. I'd just finished Pack of Lies which was narrated by a woman who lies: it occurred to me that she might reveal at the end of the narrative that she wasn't even a woman. That doesn't happen, but it did start me thinking. The eponymous central character of Heaven is a transvestite, and flicks between different worlds: male / female, night / day, past / present. That's pretty much the story.