Doors Into Chaos
An enigma from the distant past threatens the future of the galaxy!

Doors Into Chaos is a Pocket TNG novel – the third novel in the Gateways series – written by Robert Greenberger. Published by Pocket Books, it was first released in .

Summary 
From the book jacket
More than 200,000 years ago, the ancient Iconians created a network of interdimensional Gateways providing instantaneous transportation across unimaginable distances. Once known as the "Demons of Air and Darkness," the Iconians mysteriously vanished many millennia ago, never to return – or so it was believed.

Summoned to an emergency briefing at Starfleet Headquarters, Captain Jean-Luc Picard is stunned to discover that the legendary Iconians have returned at last, and are offering to sell the secrets of their advanced technology to the Federation. To prove their sincerity, they have reactivated their long-abandoned Gateways, but the results have been strife and chaos throughout the entire Alpha Quadrant. Now Picard and his crew must contend with feuding Klingons and Romulans as the captain seeks to discover the sinister truth behind the Iconians' unexpected rebirth!

Background information 
 Author Greenberger devised the concept for the crossover series, and was asked to do the TNG entry as it would be "the lynch-pin to the event". He noted that the story "was inspired by  as Picard had sought out allies from around space". He also enjoyed writing the sequences with Deanna Troi commanding the Marco Polo. ()
 This novel has a cliffhanger conclusion, which is resolved in the What Lay Beyond short story "The Other Side".

Characters 
 Jean-Luc Picard

 Deanna Troi  acting captain of the starship Marco Polo.
 Carter Brisbayne  Starfleet captain, of the USS Mercury.

  Vulcan, captain of USS T'Kumbra.
Grekor  Klingon, captain of IKS Chargh.
Tarnan  Klingon, captain of IKS Qob.
Desan  Romulan, commander of Glory.

Taleen  Nyrian

Bractor  Ferengi, DaiMon of the Kreechta.
Federation President Female
Other novels establish that the president at this time is the Bolian male, .

 References Bloodsword : Romulan ship.
IKS Chargh : Klingon  warship, commanded by Captain Grekor.
USS da Vinci : Federation starship (Star Trek: Starfleet Corps of Engineers)
ES135659  Ship which was used to represent an Iconian craft in the ruse perpetrated by the Petraw.
  Federation starship.Glory : Romulan ship, commanded by Commander Desan.Kreechta : Ferengi marauder commanded by Bractor.
USS Mercury :  Federation starship commanded by Captain Brisbayne.
USS Marco Polo : Sabre-class Federation starship, temporarily commanded by Commander Troi.
Petraw  species that impersonated the Iconians
IKS Qob : Klingon K't'inga''-class warship, commanded by Captain Tarnan.

  Federation starship commanded by Solok.

External link 
 

cs:Doors Into Chaos
Novels