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Book

Operation Stormwind
Operation Thor
Operation Titan
Operation Valkyrie
Planet of Light
Ramps Down, Troops Away!
Renegade of Callisto
Renegades of Time
Rocket Jockey
Rocket to Luna
Rockets Through Space
Rockets to Nowhere
Roman Gold
Royal Yankee
Saffron's Army
Saffron's Trials
Saffron's War
Science Fiction and Fantasy of Robert W. Lowndes
Sea Wolf #1: Steel Shark
Sea Wolf #2: Shark North