- Genius Bonus: The reference book The Klingon Dictionary contains the word "ghIlaSnoS", defined as "an ancient political movement". "ghIlaSnoS" is pronounced something like "ghi-lash-nosh", which is close to "glasnost" (and factor in that in Star Trek: The Original Series the Klingons were stand-ins for Soviet Russia).
- Hilarious in Hindsight: A Deep Space Nine book released in 1999 is titled The 34th Rule. Said rule is 'war is good for business,' but tell that to people today.
- Tear Jerker: In the early DS9 novel The Siege, a temporarily impassable wormhole tears an incoming ship to shreds. When the crew scans the debris it turns out to have been a Borg cube. When Jake finds out that the monsters that killed his mom have a shortcut to their doorstep, he freaks out at Sisko over dinner and it takes all of Ben's not inconsiderable dad skills to calm him down.
YMMV / Star Trek Expanded Universe