How did he do it?
Manage to push himself through such an intense grieving period?
That whole year is just this really painful blur.

HarperCollins Publishers; Jim Spellman/WireImage
Ill Be Gone in the Darkmarks McNamaras greatest achievement, a fitting cap to a career of investigative writing.
He does remember being nervous about getting the bookright, however.
Absolutely, yeah, he says when asked.
It was her book and its an amazing book.
I wanted to do right by her.
She recalls how he recruited McNamaras researcher Paul Haynes and crime journalist Billy Jensen to compile the book.
Hes just been leading the way, she says.
He knows the book: He justgothow Michelle thought about it.
It was a total commitment.
… Hes just been a real champion.
Even at a distance, though, he saw what motivated her what her obsession was rooted in.
She was a very logical person with a lot of compassion, Oswalt says.
Thats what drove her.
Oswalts main goal, Barth adds, was to keep things in Michelles voice.
Ill Be Gone in the Darkpublishes Tuesday, concluding a nearly two-year journey to completion.
But hes no less committed to honoring McNamaras memory.
Its very painful, he admits.
Ill Be Gone in the Darkis availablefor purchase.