Amazon.com is having an absolutely fantastic sale on the Star Trek: Vanguard series, each book is 99 cents each and I’m told that the story wraps up in the final books, so there’s no annoying loose threads.

Harbinger
Summon the Thunder
Reap the Whirlwind
Open Secrets
Precipice
Declassified
What Judgments Come
Storming Heaven
In Tempest’s Wake

There’s also a sale on the excellent Typhon Pact books as well, this is where the story lines from the end of the television series are picked up and continued onward into the future :
Star Trek: Typhon Pact: 1 Zero Sum Game
Star Trek: Typhon Pact: 2 Seize the Fire
Star Trek: Typhon Pact: 3 Rough Beasts of Empire
Star Trek: Typhon Pact: 4 Paths of Disharmony
Star Trek: Typhon Pact: 5 The Struggle Within
Star Trek: Typhon Pact: 6 Plagues of Night
Star Trek: Typhon Pact: 7 Raise the Dawn
Star Trek: Typhon Pact: 8 Brinkmanship

from www.startrekbookclub.com/4659/amazon-com-vanguard-typhon-pact-99-cent-sale/