What did you make of the way this chapter was started?
What is different about this door knob?
Why does Oskar's grandmother allow Thomas back into her life?
The code using telephone pad numbers may have thrown you. Here is a comment I found on the internet concerning this code:
“On behalf of my English classes, I wrote to Mr. Foer’s agent several years ago, asking about the number code in ELIC. He was kind enough to respond personally; regretting the time my students had spent decoding, and admitting that the numbers can’t be deciphered. He did say that in a way, this is consistent with the theme of people trying to communicate and failing, but the numbers themselves are more or less random, with a few exceptions. I hope this helps.”
If you do a search for this decoding, you will find that many have tried and have only been able to decode bits and pieces. I think the explanation above will suffice, so don't kill yourself trying to decode it. If, however, you do find a way to decode it, by all means share what you decoded.
What do you find interesting/confusing/disturbing about Oskar's grandmother's behavior towards "the renter"?
It makes sense that Thomas (Oskar's father) wanted to meet his own father...but why did he see him only once after he had found him? And why is Thomas' father still writing letters to him?
If it was Simon Goldberg in the bookstore, why would he simply hug Oskar's grandfather and then run away?
Why do you think Mr. Black never told Oskar about his grandfather?
What do you think about those last few pages that get more and more dense with typing?