I don't have any resources for this, but do have a comment.
Just make sure you have a safety word for any type of bondage you do or tieing up. It should be some other word other than STOP. Something like BANANA. Make sure you both know the word every time before you start, and if it's uttered then stop everything.
I can help you in spicing things up in a way. This website has a list of different positions that can benefit you and her take a look.
The Sex Position Master: Spork: MensHealth.com
I just figured you might enjoy this.