Miniseries

a Miniseries is a short series of interconnected works.

Star Trek: The Original Series

 * Rihannsu (5 boooks, by Diane Duane)
 * My Brother's Keeper (3 books, by Michael Jan Friedman)
 * New Earth (6 books, by various authors)

Star Trek: The Next Generation

 * Q-Continuum (3 books, by Greg Cox)
 * Double Helix (6 books, by multiple authors)

Star Trek: Deep Space Nine

 * Rebels (3 books, by Dafydd ab Hugh
 * Millenium (3 books, by Judith and Garfield Reeves-Stevens)

Star Trek: New Frontier

 * Excalibur (3 books, by Peter David)

Cross-series

 * Star Trek: Day of Honor (5 books, by multiple authors)
 * Star Trek: The Captain's Table (6 books, by multiple authors)
 * Star Trek: The Dominion War (4 books, by John Vornholt and Diane Carey
 * Star Trek: Invasion! (4 books, by multiple authors)