Back in the 1950s, I wrote a series of six derring-do novels about David "Lucky" Starr and his battles against malefactors within the Solar System. Each of the six took place in a different region of the system and in each case I made use of the astonomical facts-as they were then known. Now, a quarter-century later, Gregg Press is bringing out the novels in new hardcover editions; but what a quarter-century it has been! More has been learned about the worlds of our Solar System in this last quarter-century than in all the thousands of years of earlier observations. Prior to the 1950s, you see, we could only look from Earth's surface; since then, we have been able to send out rocket probes to take photographs and make studies at close range. The only one of the six Lucky Starr novels that has remained untouched by this-at least so far-is LUCKY STARR AND THE PIRATES OF THE ASTEROIDS, which was written in 1953. There is evidence that many of the asteroids may be a little darker and just a little larger than had been thought earlier, but that makes very little difference. Therefore, Lucky can fight the pirates and engage in his deadly duels right now just as he did a quarter-century ago, when this book was written. It I had to write the novel today, I would hardly have to change a word. Isaac Asimov DEDICATION To Frederik Pohl,