Need Help: Any good textbook in undergrad multi-variable analysis/calculus?
Solution 1:
I like C.H. Edwards, "Advanced Calculus of Several Variables." It's cheap and contains many exercises and examples.
Solution 2:
Spivak has a good book in multivariable calculus. Harvard, I think, uses Hubbard's Vector Calculus, Linear Algebra, and Differential Forms: A Unified Approach. Another book which is used is Shifrin's Multivariable Mathematics, which I believe Harvard uses as well.. For Shifrin's book at least, you can buy a solution manual online.
Solution 3:
http://www.math.harvard.edu/~shlomo/
Solution 4:
Here are some free options:
http://www.whitman.edu/mathematics/multivariable/
http://synechism.org/drupal/cfsv/
http://www.mecmath.net/
I maintain a catalog of free books at http://theassayer.org , and you could poke around there for further possibilities.