i am learning jquery at this time. wanna get another book to learn more advance web development through jquery. which one should i get

Jquery UI

OR

Jquery Mobile


are they both very much different from each other? i know UI is for creating interface and mobile for mobile web development but the thing i wanna ask is that are they both very much different in learning from each other.

please advice.

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