I ran across some James Doohan books that are actually written by S M Stirling. I have liked a bunch of Stirling's books so I got the ebooks though I really haven't had much luck with Star Trek books. Mostly disappointing tho occasionally good. Spock's World was good. It got a Goodreads rating of over 4.0.
Goodreads has a long list of Trek books so I selected those rated over 3.99 by more than 499 readers.
2. Uhura's Song by Janet Kagan 4.04 2,299 ratings
3. Spock's World by Diane Duane 4.05 2,990 ratings
7. Gods of Night (Star Trek: Destiny #1) by David Mack 4.11 3,246 ratings
10. Mere Mortals (Star Trek: Destiny #2) by David Mack 4.21 2,870 ratings
11. Lost Souls (Star Trek: Destiny, #3) by David Mack 4.29 2,733 ratings
12. Q-Squared (Star Trek: The Next Generation) by Peter David 4.01 3,763 ratings
13. Sarek by A.C. Crispin 4.03 2,006 ratings
14. Time for Yesterday by A.C. Crispin 4.05 1,747 ratings
19. Federation by Judith Reeves-Stevens, Garfield Reeves-Stevens 4.05 2,388 ratings
22. Prime Directive by Judith Reeves-Stevens, Garfield Reeves-Stevens 4.02 2,267 ratings
23. Star Trek: The Next Generation Technical Manual by Rick Sternbach, Michael Okuda 4.16 2,228 ratings
31. A Stitch in Time by Andrew J. Robinson 4.33 2,401 ratings
39. The Persistence of Memory (Star Trek TNG: Cold Equations, #1) by David Mack 4.10 1,850 ratings
56. Once Burned (Star Trek: The Captain's Table, #5) by Peter David 4.02 741 ratings
61. The Never Ending Sacrifice by Una McCormack 4.29 672 ratings
62. The Lives Of Dax (Star Trek: Deep Space Nine) by Marco Palmieri (Editor) 4.07 981 ratings
75. Silent Weapons (Star Trek TNG: Cold Equations, #2) by David Mack 4.08 1,460 ratings
82. The Crimson Shadow (Star Trek: Typhon Pact) by Una McCormack 4.13 997 ratings
89. Full Circle (Star Trek: Voyager) by Kirsten Beyer 4.07 1,674 ratings
95. Reap the Whirlwind (Star Trek: Vanguard, #3) by David Mack 4.17 638 ratings
96. Precipice (Star Trek: Vanguard, #5) by David Mack 4.13 512 ratings
112. The Eternal Tide by Kirsten Beyer 4.16 1,212 ratings
117. A Ceremony of Losses (Star Trek: The Fall) by David Mack 4.18 854 ratings
135. Articles of the Federation (Star Trek) by Keith R.A. DeCandido 4.08 696 ratings
156. Unworthy (Star Trek: Voyager) by Kirsten Beyer 4.12 1,394 ratings
157. Children of the Storm (Star Trek: Voyager) by Kirsten Beyer 4.05 1,220 ratings
163. Immortal Coil by Jeffrey Lang 4.03 794 ratings
167. Disavowed (Star Trek: Section 31) by David Mack 4.03 579 ratings
168. Star Trek: The Next Generation Companion by Larry Nemecek 4.03 610 ratings
189. Imzadi Forever (Star Trek: Signature Edition) by Peter David 4.01 542 ratings
235. Gods Above (Star Trek: New Frontier, #13) by Peter David 4.06 692 ratings
243. The Enterprise War by John Jackson Miller 4.02 820 ratings
244. New Frontier (Star Trek New Frontier: #1-4) by Peter David 4.12 726 ratings