Military Special Operators Battling Across the Multiverse. Present-Day Fighter Pilots Thrust into Space Combat. Both Teams Waging an All-or-Nothing War to Reset an Altered Timeline.

Still trapped decades in the past, Vaughn and his band of military pilots and SAS special operators battle the Necks across the multiverse. Our heroes now wield powerful new allies and weapons, but the enemy robots refuse to go peacefully into the night. Attacking dirtside and spaceside simultaneously, both teams fight to flip the fortunes of battle because there’s only one answer when the question is them or us.

Fortitude pits advanced alien warships, secret weapons, brave heroes, and a smart-assed battlebot against a mechanized enemy bent on destroying all life. Fans of Expeditionary Force, the Bobiverse, Live Die Repeat, and Dimension Space will love the thrilling action in this time-travel multiverse war epic.

Read the entire Dimension Space universe!

• Dimension Space Series
  • Solitude
  • Multitude
  • Amplitude
• Multiverse Space Series
  • Magnitude
  • Fortitude
  • Book 3 Coming Soon

What Your Favorite Authors are Saying About the Dimension Space Universe

“Like ‘The Martian’ on (and above) Earth. An epic survival story with very human characters, clever problem-solving and a gripping mystery. The end left me with NO IDEA where Dean was going with the story, I couldn’t wait for the next book.”

—Craig Alanson, New York Times Bestselling Author of the Expeditionary Force Series

“R.C. Bray and Julia Whelan are individually stellar. Having them co-voice Dean M. Cole’s superb Dimension Space Series is a stroke of genius. Rich with elements of every genre, Solitude is an outstanding listen.”

—Nicholas Sansbury Smith, USA Today Bestselling Author of Hell Divers