How to edit Firmware ?

[ardidi]

If I want to do it my self

what kind of books or site should I read

and what kind of editor can use?

[Antiloop]

If I want to do it my self

what kind of books or site should I read

and what kind of editor can use?

uh.. start learning linux

anyway it's not readable in a book afaik but depends on your knowledge or knowledge you are able to gather

reading a lot here will help you to understand many things, but in first place it will require knowledge of linux.. also coding would be a pre