Deep Space Nine: Millenium
The 3 book Millenium saga for DS9 deserves a mention. It was an excellent story and introduces some great story ideas. The dark future of the War of the Prophets in Book II was excellent as are some of the new toys that the Federation has developed. Also someone explained how stardates were derived as a universal time keeping method...check it out if you haven't already.
Arise, arise, Riders of Theoden!
Fell deed awake: fire and slaughter!
Spear shall be shaken, shields be splintered,
a sword-day, a red-day, ere the sun rises!
Ride now, ride now! Ride to Gondor!
Theoden King: The Return of the King