Cosmic Computer Legacy: The Tides of Chaos

Be aware that the first 50, 000 words of this novel are also in The Merlin Gambit. This is now the re-edited and revised 2nd edition of my sequel to H. Beam Piper's Cosmic Computer. You do not have to read Cosmic Computer to understand and enjoy this sequel. For those of you who are new to Piper's brand of mid-20th century science fiction, you can read a copy of Cosmic Computer at the end of my story.  You can find my other books on my website (dwehrSFwriter dot com).
The Tides of Chaos: In this sequel, those who wish to use Merlin for the benefit of all are confronted by power players, who seem to want to embrace the chaos that would lead to a quick and violent collapse of human civilization and who may have their own Merlin-type supercomputer to help them do it. As both sides make moves and counter-moves, the outcome will depend on what happens on a secret planet called Tanith.
Cosmic Computer: Human Civilization, composed of hundreds of colonized planets, is slowly dying. The mythical supercomputer, that was supposedly used to win the war against the breakaway System States Alliance, might (if it really does exist and if it can be found) be able to mitigate the worst of the decline, but what terrible secret does it hold, that caused the Federation to abandon it after the War?