A breathtaking thriller from the USA Today bestselling author of The Last Librarian and The CapStone Conspiracy.

What he sought could not exist, but it does.
What he found could not be real, but it is.
They cannot know about his discovery, but they do.
He cannot stop them, but he must.

Ripley Gaines, a brilliant archeologist, has spent his life searching for an elusive artifact to prove his controversial theory. What he finds shocks even him. The discovery rewrites human history and promises to change the planet’s future. It must be suppressed.

The most powerful forces in the world align against him, and a deadly competition for the artifact ensues. Capturing Gaines is not enough; he, and everyone who has seen the artifact must be killed. His only hope is to stay alive long enough to decode the Cosega Sequence. Dig far enough into the past . . . you may just discover the future.

This pulse-pounding techothriller will appeal to action adventure fans of Dan Brown, A.G. Riddle, James Rollins, Clive Cussler, Ernest Dempsey, Daniel Silva, Alex Lukeman, R. D. Brady, Michael C. Grumley, Wilbur Smith, J Robert Kennedy, Marcus Sakey, and Lincoln Child. 1000+ 5-STAR reviews across the Cosega books!

Hear the buzz

"If Baldacci and Brown collaborated on an Indiana Jones mystery, this might be the finished result." -Amazon Reviewer
"Very highly recommended to the attention of dedicated science fiction fans . . . " -Midwest Book Review
"Indiana Jones meets Jason Bourne in this thrilling white-knuckle adventure!" -BookBub
"X-Files meets Da Vinci Code on the way to Tom Clancy's House.” -Amazon Reviewer
"Fans of James Rollins, Dan Brown, Clive Cussler, Wilbur Smith, AG Riddle, and Michael Grumley are going to love Cosega!" -Amazon Reviewer

Find out why nearly a million copies of Brandt Legg's books have been sold/downloaded worldwide.

COSEGA SPHERE (Cosega Sequence #4) Available now!