One of the great ideas that you'll come across when exploring the world of
Star Trek tie-in fiction is that of the relaunch novels. The concept is to continue telling the stories of your favourite Star Trek series; specifically the stories that take place after the series finale. What to know what happened to Picard and the Enterprise-D crew after the end credits of Star Trek Nemesis? There are plenty of books devoted to the idea. What happened to all the storylines that weren't wrapped up by DS9's "What We Leave Behind" and the new stories they teased? There's a novel series for that.
In fact, there are multiples novel series for that. Several dozen books, plenty of multi-series crossovers, stories taking place with a focus outside of the Federation and other stories focusing on characters that only appear in a handful of episodes and were significantly more fleshed out in the novels. Honestly, it's a treasure trove of Trek goodness. It's big, messy, and complicated. Take a look at The Trek Collective's reading guide if you need convincing about my last point.
