"Mom?" "Yes?" "I'm going out." "OK." "I'll be back later." "OK." "I don't know when. It could be extremely late." "OK." Why didn't she ask me more? Why didn't she try to stop me, or at least keep me safe?

Because it was starting to get dark, and because the streets were crowded, I bumped into a googolplex people. Who were they? Where were they going? What were they looking for? I wanted to hear their heartbeats, and I wanted them to hear mine.

The subway station was just a few blocks from her house, and when I got there the door was open a little, like she knew I'd be coming, even though she couldn't have, obviously. So why was it open?

"Hello? Is anyone there? It's Oskar Schell."

She came to the door.

I was relieved, because I hadn't invented her.

"Do you remember me?" "Of course I do, Oskar. You've grown." "I have?" "A lot. Inches." "I've been so busy searching that I haven't been measuring myself." "Come in," she said. "I thought you weren't going to call me back. It's been a long time since I left that message." I told her, "I'm afraid of the phone."

She said, "I've thought about you a lot." I said, "Your message." "From months ago?" "How weren't you honest with me?" "I told you I didn't know anything about the key." "But you did?" "Yes. Well, no. I don't. My husband does." "Why didn't you tell me when we met?" "I couldn't." "Why not?" "I just couldn't." "That's not a real answer." "My husband and I had been having a terrible fight." "He was my dad!" "He was my husband." "He was murdered!"

"I wanted to hurt him." "Why?" "Because he had hurt me." "Why?" "Because people hurt each other. That's what people do." "It's not what I do." "I know." "I spent eight months looking for what you could have told me in eight seconds!" "I called you. Right after you left." "You hurt me!" "I'm very sorry."

"So?" I asked. "So what about your husband?" She said, "He's been looking for you." "He's been looking for me?" "Yes." "But I've been looking for him!" "He'll explain everything to you. I think you should call him." "I'm angry at you because you weren't honest with me." "I know." "You almost ruined my life."

We were incredibly close.

I could smell her breathing.

She said, "If you want to kiss me, you can." "What?" "You asked me, that day we met, if we could kiss. I said no then, but I am saying yes now." "I'm embarrassed about that day." "There's no reason to be embarrassed." "You don't have to let me kiss you just because you feel sorry for me." "Kiss me," she said, "and I'll kiss you back." I asked her, "What if we just hugged?"

She held me against her.

I started to cry, and I squeezed her as tightly as I could. Her shoulder was getting wet and I thought, Maybe it's true that you can use up all of your tears. Maybe Grandma's right about that. It was nice to think about, because what I wanted was to be empty.

And then, out of nowhere, I had a revelation, and the floor disappeared from under me, and I was standing on nothing.

I pulled away.

"Why did your message cut off?" "Excuse me?" "The message you left on our phone. It just stops in the middle." "Oh, that must have been when your mother picked up."

"My mom picked up?" "Yes." "And then what?" "What do you mean?" "Did you talk to her?" "For a few minutes." "What did you tell her?" "I don't remember." "But you told her that I'd gone to visit you?" "Yes, of course. Was I wrong to?"

I didn't know if she was wrong to. And I didn't know why Mom hadn't said anything about their conversation, or even about the message.

"The key? You told her about it?" "I assumed she already knew." "And my mission?"

It didn't make any sense.

Why hadn't Mom said anything?

Or done anything?

Or cared at all?

And then, all of a sudden, it made perfect sense.

All of a sudden I understood why, when Mom asked where I was going, and I said "Out," she didn't ask any more questions. She didn't have to, because she knew.

It made sense that Ada knew I lived on the Upper West Side, and that Carol had hot cookies waiting when I knocked on her door, and that [email protected] said "Good luck, Oskar" when I left, even though I was ninety-nine-percent sure I hadn't told him that my name was Oskar.

They knew I was coming.

Mom had talked to all of them before I had.

Even Mr. Black was part of it. He must have known I was going to knock on his door that day, because she must have told him. She probably told him to go around with me, and keep me company, and keep me safe. Did he even really like me? And were all of his amazing stories even true? Were his hearing aids real? The bed that pulled? Were the bullets and roses bullets and roses?

The whole time.

Everyone.

Everything.

Probably Grandma knew.

Probably even the renter.

Was the renter even the renter?

My search was a play that Mom had written, and she knew the ending when I was at the beginning.

I asked Abby, "Was your door open because you knew I was coming?" She didn't say anything for a few seconds. Then she said, "Yes."

"Where's your husband?" "He's not my husband." "I don't. Understand. ANYTHING!" "He's my ex-husband." "Where is he?" "He's at work." "But it's Sunday night." She said, "He does foreign markets." "What?" "It's Monday morning in Japan."

"There's a young man here to see you," the woman behind the desk said into the phone, and it made me feel so weird to think that he was on the other end of the line, even if I knew I was getting confused about who "he" was. "Yes," she said, "a very young man." Then she said, "No." Then she said, "Oskar Schell." Then she said, "Yes. He says to see you."

"May I ask what this concerns?" she asked me. "He says his dad," she said into the phone. Then she said, "That's what he says." Then she said, "OK." Then she said to me, "Go down the hallway. His door is the third on the left."

There was art that was probably famous on the walls. There were incredibly beautiful views out of the windows, which Dad would have loved. But I didn't look at any of it, and I didn't take any pictures. I'd never been so concentrated in my life, because I'd never been closer to the lock. I knocked on the third door on the left, which had a sign on it that said WILLIAM BLACK. A voice from inside the room said, "Come in."

"What can I do for you tonight?" said a man behind a desk. He was about the same age that Dad would have been, or I guess still was, if dead people have ages. He had brownish-grayish hair, a short beard, and round brown glasses. For a second he looked familiar, and I wondered if he was the person I had seen from the Empire State Building through the binocular machine. But then I realized that was impossible, because we were at Fifty-seventh Street, which is north, obviously. There were a bunch of picture frames on his desk. I looked at them quickly to make sure Dad wasn't in any of the pictures.