How are you all? I hope that you're all well. I saw this post and I thought that I would contribute.
I found this website Fictionwise.com and it has a whole load of ebooks. It also has a section on Star Trek ebooks so I thought I'd share the link with you. Here's the link: https://www.fictionwise.com/StarTrekSeries.htm
Now some of you may already have these ebooks but I thought I'd share them with you anyway.