(written from a Production point of view)
Rihannsu is a five-book series of Pocket TOS novels written primarily by Diane Duane. The first two were published early in the line's history, and it was continued at the end of the numbered novels. The term Rihannsu was retroactively applied to the two earlier books when they were reprinted alongside the third and fourth novels in 2000.
- TOS #18: My Enemy, My Ally
- TOS #35: The Romulan Way (with Peter Morwood)
- TOS #95: Swordhunt
- TOS #96: Honor Blade
- TOS: The Empty Chair
Published simultaneously with The Empty Chair at the end of 2006 was Rihannsu: The Bloodwing Voyages, a trade paperback omnibus edition containing the first four novels, all revised to bring various continuity details into line with the broader spectrum of Star Trek novels.