Tsifrovaia krepost' - Braun D.

The author of the super bestseller of the decade offers you to crack another code - super-complex, concealing danger and threat to the world!
But... Who came up with this code?!
What's he trying to do?!
Why did you play a ruthless game with the U.S. National Security Agency?!
The weapon of the mysterious enemy is just a set of symbols and letters.
The best cryptographer of America Susan Fletcher is taken for deciphering.
And what it discovers, jeopardizes not only the most important developments of the U.S. intelligence agencies, but also the fate of millions of people ...
From this second on Susan begins a real hunt ...