In three, two, one.

N'an, I'm the best of the book.

Catherine Cho holds her excited son while her husband assembles a toy horse.

Two, two foot.

Four feet.

They're on four legs, kidda.

This happy family life seems a far cry from their lives three years ago.

He traveled very far away on your horse.

On your horse.

We're now in Virginia.

Like most first-time moms, Catherine Cho was nervous about being a mother.

It's such a life-changing experience, especially for a highly accomplished literary

agent who is far more comfortable managing the egos of writers than changing diapers.

Catherine was 30 years old when she found out she was pregnant.

And so it seemed kind of destined because my mother had been 30 when she had me, and so was my grandmother when she had my mother.

All the signs in her life were saying this was meant to happen.

But when Cato was born, something inside of Catherine snapped.

The stress and anxiety of being a new mom triggered postpartum psychosis,

something that affects almost two out of a thousand

new moms.

It was such a surreal experience because I basically went into a complete mental break.

Katherine went from being a quiet, self-assured, brilliant woman into something else,

...