http://www.halleonard.com check out http://www.justinguitar.com blues lessons
References :

Check out this review
http://www.whatguitarlessons.com/playingthroughtheblues.html

Also key in your search engine "keb mos blues licks"
References :
http://www.whatguitarlessons.com

look on the "Amazon" website and search for "Lick Library"
References :

This may sound cheesy but http://www.Youtube.com I use it for the lessons and it works. If you don’t want that and are willing to pay a small fee (I have a membership and it is a small fee) then if I were you I would sign up at

http://www.guitartricks.com/videolessons.php?gclid=CJKPzdaQ8ZYCFQNfFQod512mWg

Good luck and i suggest guitartricks.com it had a lot of styles in it and different artists lessons too.

-Billy
References :
http://www.guitartricks.com/videolessons.php?gclid=CJKPzdaQ8ZYCFQNfFQod512mWg