Moments Asunder
Moments Asunder is a Pocket TNG/Pocket DS9 novel by Dayton Ward, the first in a trilogy.

Summary 
Solicitation blurb
The crews of Jean-Luc Picard, Benjamin Sisko, Ezri Dax, and William Riker unite to prevent a cosmic-level apocalypse – only to find that some fates really are inevitable.

REALITY ITSELF IS UNDER ATTACK.

The epic Star Trek: Coda trilogy begins when the unexpected arrival of an old friend triggers a desperate mission to avert a fast-spreading temporal disaster.

Background information

External link
 

Novels
Audiobooks