Alice's Revenge by Bob Farmer
You place a card box with four playing cards on the table and explain that these are the four queens. A spectator may now name one of the four ladies and imagine that this lady disappears.
You take the cards out of the card box. The spectator sees four cards. They are the queens, but one of the four cards is white. It's the viewer-chosen queen that's missing! This card is now turned over and the card is also blank on the back!
In addition to the English-language original, you will receive a German quick start guide, the cards and an empty card box.