Could you please help me correct these sentences please?

- Books that sell well are those which are biographical.

- You didn't think to call before showing up.

- They didn't look at each other they way sister brother look at each other.

- It's not the same mentality here as in other countries.

- I'll do everything in my power to get you to stay.

- I would like to be able to do all I want while you are sleeping.

- Do you know how you know if someone knows you? If they buy you something that suits your personality.

Thank you
sister and brother

how to know
Philip keeps getting there before me, but is giving great advice.