Good books to learn Flash 8

Hi everybody,

I have received a gift certificate for Amazon, and I would like to spend it buying a couple of good books about Flash 8. Can anyone suggest good books?

I was thinking: Would it be better to spend it in a book about Flash, and another about Studio 8?

OR

I could just get two books about Flash. I am a graphic designer, with some knowledge of ActionScript and HTML, wanting to improve my skills.

Thank you very much for your help,