Bill Clinton autograph question

[Mann80]

So I was at my grandmas house going through her books looking for something to read and came across a book by Ambrose Evans-Pritchard called "The Secret Life of Bill Clinton". The dust jacket describes the Clinton presidency as the most corrupt in history and Evans-Pritchard supposedly exposes a bunch of secrets. My grandma (bless her heart) ended up bringing that book to see Clinton when he was running for re-election here in Iowa. Long story short she met him and had no idea what the book was about and had him sign it. Sure enough he did...I still get a laugh about it...you'd have to meet my grandma.

Well I'm new to autographs my question is: how would I get a value on this?

I'm pretty sure there's not too many Clinton autographs on items that are derogatory...

Any help would be greatly appreciated