The textbook (Halliday, Resnick and Walker, "Fundamentals of Physics,"
6th ed. should be available at the Yale (Barnes
& Noble) Bookstore. Special pricing is offered for the 2 volume set,
equal to the price of the one-volume combined text. Note that this
is a new edition so you won't be able to get it from students from previous
years of Physics 180-181.