I have a coding interview in 2 hours. What should I read?

If its in two hours I suggest you read the company's website and drink a cup of tea. If you don't know it now you won't know it in two hours and you'll just stress yourself trying.

Agreed.

Honestly, I read stories or articles that help me feel more confident before an interview. Everyone has something unique to help them, but for me, I'll read some new update on R or python or read a few online threads about cool things. Then, in the interview, I casually bring up something I read about. That makes me sound smart too!

You could go through a list of <programming language> design patterns, just as reminder what, e.g. a factory is. Also I've seen that a session start with an empty text editor, do you know how to write a class with a single empty method without copy&pasting from existing code?

Otherwise I agree with davman, relax.

Spend 10 minutes visualizing yourself as the smartest person / programmer you know.

This approach has been proven to help significantly in all sorts of situations.

Just relax and continue reading hackernews. Maybe you'll find something interesting to talk about.