I agree that Catholicism for Dummies is very good.
Here are some other ideas:
Mass Appeal by Jimmy Akin (small booklet of about 30 pages explaining the Mass)
Pillar of Fire, Pillar of Truth by Catholic Answers (small booklet of about 30 pages)
Jimmy Swaggert Made Me Catholic by Tim Staples (2 CDs explaining his conversion to the Church and overcoming many of the protestant misconceptions of Catholicism)
The Lamb’s Supper by Scott Hahn (there’s a book and also a DVD/VHS)
Surprised By Truth by Patrick Madrid (several conversion stories; I think there are 3 editions)
Why Do Catholics Do That? by Kevin Orlin Johnson (book)