Gregory Peter Le Sage writes science fiction thrillers and techno-thriller novels. His works include Quantum Eschaton, a quantum computing book about stolen breakthroughs and espionage, and Cassandra Omen, an alien invasion novel exploring freedom, survival, and humanity’s future.
Welcome
Explore the science-based fiction of Gregory Peter Le Sage, featuring cutting-edge ideas, danger, and unforgettable stories.
Books

Quantum Eschaton
A dark techno-thriller about quantum computing, espionage, and a conspiracy that threatens the world order.
Buy eBook or Paperback Buy Audio Book Read Reviews More at greglesagebooks.com
Cassandra Omen
A chilling story of alien invasion, hidden truths, and one man’s desperate attempt to warn humanity before it’s too late.
Buy eBook or Paperback Read ReviewsAbout the Author
Gregory Peter Le Sage is a scientist and engineer at SLAC National Accelerator Laboratory. His fiction blends deep technical knowledge with thrilling, dangerous plots about the future of technology and humanity.
Get the Free Quantum Eschaton Audiobook
Enter your email to receive the audiobook download page.
Contact
For inquiries, reach out via email or connect on author pages.
Email Me Amazon Author Page