The edition of WON that works best for an undergrad class depends on how much time you plan to devote to Adam Smith in your course. I teach a freshman seminar on the WON where I use the 1976 OUP edition of Campbell, Skinner and Todd in the inexpensive Liberty Classics paperback. In a regular HET class, where I devote two weeks to Adam Smith, I like to use the abridged version of WON in Robert Heilbroner's _The Essential Adam Smith_, which also contains excerpts from other writings of Smith such as TMS. I am sure there are many other good abridged versions of WON. Andrea Maneschi