Obstfeld and Rogoff's book contains …

Obstfeld and Rogoff's book contains many interesting exercises, although some are quite difficult. See "Course information" for a link to their homepage where you can find solution manuals. I recommend that you solve most of the exercises to Chapter 1, at least 2, 3, 6 and 7. For chapter 2, it is 1-3 that are useful. Tord