Do you say I write you or i write to you?

write to someone is the correct word although many people say write someone

Yes there is. Speech recognition will auto type out what you said.

good question but its as simple as possible.

It actually depends. You would use which if you were asking what book they wrote among a certain selection of books. You would use what if you were just asking in general.

I wonder if you are thinking of gourmet which means a connoisseur of good food.