Marco's Comments:
This book test is formed by a pamphlet (on cardboard) with the explanation and the description of a routine, plus two gaffed books: "The Divorce Decision" and "Profitable Export Marketing". While the books themselves are normal, their dustjacket acts as a "key" (cue list) for the other book, in a way similar to the "Economicon". The books are very 1980s, and geared to the American market: to perform this book test now, it will be suspicious.
This effect comes from the Herb Zarrow's collection