What book did Linus Torvalds write?

he is a Finnish software engineer best known for initiating the development of the Linux kernel. He now acts as the project's coordinator.

Cornelia Funk, the author of Inkhert writes about a book in her book Inkheart. There are more but i don't feel like naming them

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.

You learn how to write a book. Here are some links to get you started -- then you go get some How-To-Books or take some classes! It's either that or get ready to hire someone to write the book --...

I dont exactly understand what it is your asking, but i write my books in my notebook. Some people type theirs, either way works.