Rip knew the Mexican officer was among the best of his own graduating class. "I have to admit prejudice," he warned. "Flip is a pal of mine. But I don’t think you could do better." His curiosity got the best of him and he asked, "Can you tell me what this is all about?" Joe Barris reached over and rubbed Rip’s bald head. "By the time fur grows back on that irradiated dome of yours, I’ll be on my way with Koa, Pederson, and the new recruits. Santos and the rest of your crew will report to Terra base. Flip Villa will join them there. You’ll be on earth-leave for eight weeks, but it will take about that much time for Flip and the men to assemble the supplies and equipment we’ll need." He pulled a sheaf of papers out of the envelope. "Koa, here are orders for you and your men. They say you’re to report to Special Order Squadron Seven, on Ganymede. SOS Seven is a new squadron, the first one organized exclusively for exploration duties, and I’m its commanding officer. Koa, you’ll be my senior noncommissioned officer. I want you and Pederson with me because you can organize the new recruits enroute. They have a lot more to learn from you than they got in their two years of training. You’ll make real Planeteers out of ’em." He picked a paper from the sheaf and waved it at Rip. "This is for you, Lieutenant Foster." He read, "Foster, R.I.P., Lieutenant, SOS. Serial seven-nine-four-three. Authorized eight weeks’ earth-leave upon discharge from hospital. Upon completion of leave subject officer will report to Terra base for transportation to SOS Seven on Ganymede." Joe Barris handed Rip his new orders. "You’ll be on the same ship with Flip Villa and your men. Flip will be another of my platoon leaders. I’ll be waiting for you on Ganymede. The moons of Jupiter will be our home for quite a while, Rip. Our first assignment is to explore Callisto from pole to pole." Rip didn’t know what to say. To serve under Barris, to have his own men in a regular squadron platoon, to have Flip Villa in the same outfit, and to be assigned to exploration duty—dirtiest but most exciting of all Planeteer jobs—it was just too much. He couldn’t say anything. He could only grin. Major Joe Barris looked at Rip’s shiny head and chuckled. "From what I hear of Callisto, we’re in for a rough time. Your hair will probably grow back just in time to turn gray!" WHITMAN BOOKS FOR BOYS AND GIRLS NEW STORIES OF ADVENTURE AND MYSTERY Up-to-the-minute novels for boys and girls about favorite characters, all popular and well known— ROY ROGERS and the Rimrod Renegades ROY ROGERS and the Gopher Creek Gunman ROY ROGERS and the Raiders of Sawtooth Ridge ROY ROGERS and the Outlaws of Sundown Valley ROY ROGERS and the Ghost of Mystery Rancho