As the title says, I'm looking for an approachable upper division mechanics book. I'm starting my upper division come fall, and want to get a head start on this course. Sone background: I've taken the traditional mechanics, E&M, and modern physics (light, waves, intro to relativity and quantum) and math including calc 1-3, linear algebra and differential equations. All courses at the lower division level. Anyone have any suggestions on a book that my background is suitable for?