“Move over, Bourne and Bond—the espionage game has a new player and Calli Chase is here to finally bring the genre into the twenty-first century.” —Mystery & Suspense Magazine
“The creator of Medical Examiner Kay Scarpetta peers into space and finds just as much skullduggery there…[introducing] an equally strong, even more tormented heroine…[in] federal special agent Capt. Calli Chase.” —Kirkus Reviews
“Move over, Doctor Kay Scarpetta…Quantum inaugurates a new series with a confident new heroine…” —The Telegraph
“Brilliantly crafted, gripping, and smart…” —Post Register
“Buckle up for a race to the finish that does not disappoint.” —Bookreporter
“As always, Cornwell establishes time, place, and mood by expertly crafting each scene to make you feel as if you’re in it.” —New York Journal of Books