The Cassandra Project by Jack McDevitt

Two science fiction masters—Jack McDevitt and Mike Resnick—team up to deliver a classic thriller in which one man uncovers the hidden history of the United States space program.

"Houston, we have a problem."

Formerly a cynical, ambitious PR man, Jerry Culpepper finally found a client he could believe in when he was hired as NASA's public affairs director. Proud of the Agency's history and sure of its destiny, he was thrilled to be a part of its future.

But public disinterest and budget cuts changed that future. Now, a half century after the first Moon landing, Jerry feels like the only one with stars in his eyes.

Then a fifty-year-old secret about the Apollo XI mission is revealed, and he finds himself embroiled in the biggest controversy of the twenty-first century, one that will test his ability—and his willingness—to spin the truth about a conspiracy of reality-altering proportions...