I'll just reiterate what I said in another thread about how it's great to see new - or relatively new in Axionz case – viewers really appreciating Michael O'Hare's performance given how disliked he was by many people during the original run in the 1990s. It's such a tragedy he isn't with us anymore to see the praise that comes his way.
@Axionz (should I surmise from your name that you are made of dark matter??): there's 18 novels in total, including three trilogies centring around the Psi Corps, Centauri Prime and the Technomages. All the trilogies are canon. I didn't particularly like the Psi Corps trilogy, the Centauri trilogy is excellent, I've only read the first book of the Technomages, it wasn't very good but I'm led to believe all the interesting stuff comes in the second and third books.
There is also book #9, To Dream in the City of Sorrows, all about Sinclair's time on Minbar, him becoming Ranger one and the fate of Catherine Sakai. That is the best B5 novel in my opinion. There's also a comic book series, which you can find easy enough on eBay in graphic novel format, called In Valen's Name that concludes Sinclair/Valen's story. The art isn't great though.
Edit: actually there are more B5 novels than I remembered – I forgot about the three movie novelisations. KoshN made a good list here:
https://www.b5tv.com/threads/b5-novels-novelizations-and-short-stories.11723/