• Delphi Nation (Delphi in Space Book 4)
• Delphi Federation (Delphi in Space Book 6)
• Delphi Station
• Delphi Exploration (Delphi in Space Book 7)
• Matthew and the Stone
• Delphi Alliance
• Stone Investigations (Stone Series Book 4)
• Delphi Challenge
• Stone Undercover
• Stone Ranger
• Delphi League (Delphi in Space Book 10)
• Delphi City