[J.W.] When senior faculty members at CalTech want to sit in on a freshman mechanics class, the lectures have to be pretty stellar. And they are. Leighton and Sands compiled Feynman's lectures into a phenomenally readable book that anyone serious about physics should check out at least once. In general, the lectures are pretty basic (you only need some calc), but Feynman was born somewhere near the Crab Nebula, so his insight into physics is significantly greater than that of most humans. Even now that I'm quite a bit beyond introductory mechanics, I still find myself going back to the Feynman Lectures to validate my intuition, or just to enjoy some of his remarkably insightful, lucid expostions. This is really physics bathtub reading at its best.

A fairly sophisticated treatment of Newtonian physics. K&K has good, although sometimes dry, discussions of the physical principles, contains a goodly number of non-trivial examples, and has problems which require physical intuition and mathematical skill. Good for building up your technical know-how, which is why it's used in PH141. I'm not a fan of its chapters on special relativity; for all their 4-vector notation they're not very geometrical. It bugs me that the most modern elementary mechanics textbook still uses imaginary time instead of just introducing the Minkowski metric.