Like Viking's The Portable Nietzsche, a relatively inexpensive ($14.95 US) compilation of Friedrich Nietzsche's more notable works. It features translations by eminent Nietzsche scholar Walter Kaufmann of the following books:

It also contains 75 aphorisms from five separate works, an informative and helpful introduction by Peter Gay, some commentaries, and an invaluable index. Conveniently, there is relatively little overlap between this volume and The Portable Nietzsche, and possession of both guarantees that one will have relatively little to buy in order to complete one's collection of the philosopher's works.