Here is the list of Star Trek eBooks at Amazon UK for £0.99.
https://www.amazon.co.uk/s?k=star+tr...11&ref=sr_pg_1
The Star Ghost (Star Trek: Deep Space Nine Book 1) by Brad Strickland
Shadows of the Indignant (Star Trek: The Original Series) by Dave Galanter
The Battle Of Betazed (Star Trek: The Next Generation) by Susan Kearny and Charlotte Douglas
St Voyager #16 Seven Of Nine (Star Trek) by Christie Golden
String Theory Book One: Cohesion (Star Trek: Voyager) by Jeffrey Lang
The Lost Era: Catalyst of Sorrows (Star Trek: The Original Series) by Margaret Wander Bonanno
The Lost Era: Catalyst of Sorrows (Star Trek: The Original Series) by Margaret Wander Bonanno
Mosaic (Star Trek: Voyager) by Jeri Taylor
Terok Nor: Night of the Wolves (Star Trek: Deep Space Nine) by S.D. Perry
The Eternal Tide (Star Trek: Voyager) by Kirsten Beyer
Echoes (Star Trek: Voyager) by Dean Wesley Smith , Kristine Kathryn Rusch , et al.
Flashback (Star Trek Voyager) by Diane Carey
Excelsior: Forged in Fire (Star Trek: The Original Series) by Michael A. Martin and Andy Mangels
The Fearful Summons (Star Trek: The Original Series Book 74) by Denny Martin Flynn