That knowledge, bought with twenty years of his life, was worth more than the seventy-four million dollars, and it seemed to me a kind of desecration to let it protect only me, its single original subject, and then die with me.

There are so many others living the life my mother had lived, hunted by someone who wants to use their weakness against them, needing exactly the walls my father knew how to build.

I could not save them all.

But I could take the thing he had perfected in order to save one child, and turn it outward, and make it available to any mother, any child, who needed to become invisible in order to become free.

My father spent his genius keeping one family safe in the dark.