[support] Specific Role for Specific Node Content

[Quaid J. Surti]

Hello All,

I have created a new role 'Star user' and I want a specific eBook to 
be available to this role only after they have filled a webform 
linked to the eBook node:content.

I have tried to use rules module but have been unsuccessful in 
creating one that works.

Can some one assist/help me in either creating a rule or some 
other way to make the eBook only accessible to 'star user' where 
they fill-up the webform and download the product.

Quaid J. Surti