Double or Nothing
Picard and Calhoun unite to face a threat that has spanned the galaxy!

Double or Nothing is a Pocket TNG novel – #55 in the numbered series, and the fifth novel in the Double Helix miniseries – written by Peter David. Published by Pocket Books, it was first released in , and also forms part of the storyline of Star Trek: New Frontier.

Summary 
From the book jacket
Like a lethal bacillus coursing through the bloodstream of the galaxy, a fiendish master plan has spread death and terror across the 24th century – until two heroic captains risk everything to stamp out the evil at its source!

For more than a decade, since the very beginning of the Starship 's mission, unknown enemies have unleashed a string of deadly biological weapons throughout the Alpha Quadrant, inflicting ghastly epidemics upon the Romulans, the Cardassians, the Bajorans, and even the Federation. Now, at long last, Captain Jean-Luc Picard joins forces with Captain Mackenzie Calhoun of the Starship Excalibur to track down and confront the hidden architects of the plagues – and avenge the deaths of thousands!

Background information 
 The novel contains Chapter One of the serialized novel Starfleet: Year One.
 Events in this novel lead to the climax of the Star Trek: New Frontier novel Dark Allies.

Characters 
Jean-Luc Picard
Mackenzie Calhoun

External link 
 

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de:Doppelt oder nichts
Novels