Aliens threaten Earth.
Our best weapon is the super AI they’ve come to steal.
Classic Sci-Fi Series. Futuristic Thrills.
The Crystal Series is four full-length books of action and suspense where the emergence of self-aware AI and alien first contact occur at the same time.
Criss is a four-gen AI with the cognitive ability of a thousand humans. Hard-wired to protect and support his human leadership, Criss serves Juice Tallette, the crystal scientist who created him; Cheryl Wallace, captain of the Fleet space cruiser Alliance; and Sid, a covert spy for the Defense Intelligence Agency who helps Criss protect Juice and Cheryl while they all strive to safeguard humanity.
Purchase Link: Amazon for Kindle & Paperback
Crystal Deception (Book 1) goes full throttle when alien aggressors—determined to take Criss for themselves by any means necessary—present a mortal threat to Earth. The team fights to protect Criss and repel the invaders, and in the process discover why they forever will be joined in a powerful alliance.
Crystal Conquest (Book 2) continues the adventure begun in Crystal Deception. The aliens are down, but by no means out. And this time they return for revenge. Led by a powerful AI Goliath, the aliens are determined to vanquish Earth. Can the team stop them before it’s too late?
Crystal Rebellion (Book 3) takes place on Mars where the action centers on three AI crystals left behind after the last alien invasion of our solar system. Join the adventure as the team struggles to save humanity, and soon realizes they need to save themselves.
New: Crystal Escape (Book 4) ramps the excitement as an alien AI eludes capture and breaks for her home world with information that compromises the security of Earth. Can the team stop the alien being and rescue the hostages before they are lost to the boundless depths of interstellar space?
Free: Crystal Horizon is a short prequel to Crystal Deception that serves as a free series sampler for new readers who want to learn more. Enjoy a mini-adventure that introduces you to Sid and Cheryl at the time when they first meet. It’s a great way to sample the series. Crystal Horizon also provides fans a fun opportunity to reconnect with some favorite characters.
Recent Author Interviews
I have new interviews on wonderful book blogs written by Marcia Carrington and Cheryl Lawson.
And listen to my audio podcast interviews conducted by Emit Blackwell and Mark Combs.
I’d love to hear from you. Contact me at doug(at)crystalseries.com and let me know what’s on your mind.
Doug J. Cooper
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