Possession (novel)
Alien entities infect the minds of Picard and his crew!

Possession is a Pocket TNG novel – #40 in the numbered series – written by J.M. Dillard and Kathleen O'Malley. Published by Pocket Books, it was first released in .

Summary 
From the book jacket
Eighty years ago, bodiless entities brought a plague of violence and bloodshed to the planet . The nightmare only ended when the entities were trapped inside special containers.
  
Now, on the eve of a galaxy-scale scientific exposition, the containers have been opened, freeing the malevolent entities to possess the minds and bodies of all they encounter, including the crew of the Starship Enterprise. Friends turn into foes, and no one can be trusted, as Captain Picard faces a deadly and insidious threat. Unless the entities can be stopped once more, they will spread their madness throughout the entire Federation.

Background information 
 This is a -era sequel to the novel , also by J.M. Dillard.
 The back cover states that it has been eighty years since the events of the prior novel, but it is much closer to one hundred.

Characters 
 Jean-Luc Picard
 Guinan
 Alexander Rozhenko
 Alyssa Ogawa

External link 
 

cs:Possession
de:Wahnsinn (Roman)
Novels