Wordpress Bible vs How to be a rockstar wordpress designer

hello all,

i want to buy a book. i am confused between Wordpress Bible vs How to be a Rockstar Wordpress Designer(part1 or part 2),Also Wordpress web design. i need to first learn its wordpress template designing and wanna go for advance designing. please advice me a book for that. can also suggest any other book(must be some advance(: )

#my skills:PHP,CSS,HTML,Sass,Compass,Adobe Photoshop,Corel Draw,Adobe Illustrator,Adobe Dreamweaver