Firewall

""When top agent Bruce Tucker loses his family to terrorists, he vows to leave the CIA forever. Now employed by Mortimer Fox, the artificial-intelligence agency czar, Tucker learns that even his samurai-honed skills can't save Fox from a sudden heart attack. As the man crumples in Tucker's arms, he gasps out cryptic words."--Jacket."
"After the death of his employer, Fox, ex-CIA agent Bruce Tucker races to find Fox's daughter Monica, who is in possession of a top-secret, time-sensitive code capable of launching the world's nuclear missles."@en
"The final words that Mortimer Fox whispered to ex CIA agent Bruce Tucker. Cryptic words said in a code coveted the world over, a code that could wipe all the world's powers off the map and trigger Armageddon. The words are understood by a few, but are especially desirable to Vlad Jarkko, Tucker's nemesis from his CIA days. And when Jarkko snatches Monica Fox, Mortimer's daughter, Tucker must resume the blood feud and find Monica before she capitulates to her abductor's unspeakable tortures. At the publisher's request, this title is being sold without Digital Rights Management software (DRM) applied."@en