Mineola, New York: Dover Publications, Inc. 2002. — 415 p.
(Originally published: Berlin: New York: 1979, in series: Perspectives in Mathematical Logic.)
The original edition contained its fair share of misprints and mistakes. All those of which I am aware are listed in the Corrections and Additions appendix, which also contains some additional historical references and a small number of exercises based on the material in the book.