Cisco CCIE guidance

#1
Hello,

I'm looking to write the Cisco CCIE exam and was hoping I could seek some guidance.

1. How many days of preparation is generally required for this? A few days? Weeks?

2. Where can I find the materials to prepare from? Perhaps a book I could buy? I've noticed a few resources available on the internet. Are these exactly sufficient to clear the exam? Any specific preparations suggestions you have to offer?

3 .How much does it cost to take up the exam and how long is the certificate valid? Is it accepted internationally?

Thank you for your help!