From the Afterword:In the "It Can Now Be Told" Department, we may now reveal that the mysterious "Commander X" was none other than the enlightened Venusian sage, Commander Valiant Thor. Unfortunately, this sleight-of-hand was necessary during most of the 20th century, due to heightened Cold War tensions and various threats that had been made against Thor and his family, who were working hard to end warfare and nuclear bomb testing on Earth. Since...