"Est Sularus....

[Raistlin]

Warning: major DragonLance nerding out ahead.

Take a wild guess who my favorite character is.

I actually used to make a DragonLance thread every year or two here, but haven't for the last... 7 or 8 years probably (god I've been here way too smurfing long). I first got started with DragonLance when I was about 11 or 12. I literally was just browsing the fantasy/sci-fi section and the couple of shelves devoted to DL caught my eye, despite the fact that I had never even heard of the series before. It took a minute or two of browsing to settle on Dragons of Autumn Twilight (book 1 of the Chronicles trilogy) as the appropriate starting point -- and I was lucky enough to get that one right. I since quickly absorbed the main Weis/Hickman series (multiple times) and branched out to the non-Weis/Hickman DL books -- most of which are just meh, but some are good (I view them as basically polished fanfiction about the "real" canon series, written by Weis and Hickman).

I could still recite the story of the main series pretty much by heart, despite the fact that I haven't read the books in many years now. (btw, you mixed up the titles of Dragons of a Fallen Sun and Dragons of a Lost Star). And the Legends trilogy (Time of the Twins, War of the Twins, Test of the Twins) remains what I consider to be some of the best writing in the fantasy genre. Test of the Twins hit me right in the feels every time, no matter how many times I read it.

As for where the series is today, Weis/Hickman went on to write a companion trilogy to Chronicles which was pretty meh. I consider the series to be over and done with at the conclusion of the War of the Souls (Dragons of a Vanished Moon). But you should definitely go back and read the rest of the full "main" series, which I consider to be:

Chronicles (Dragons of Autumn Twilight, Dragons of Winter Night, Dragons of Spring Dawning)
Legends (Time, War, and Test of the Twins)
Raistlin Chronicles (Soulforge, Brothers in Arms)
Second Generation
Dragons of Summer Flame

To answer your question, yes, there is a Huma-based book. It's one of the non-Weis/Hickman novels, but probably one of the better ones. I think it's just called The Legend of Huma.

Also, if you like DragonLance, you should definitely read the Death Gate Cycle series, a Weis/Hickman series that's outside the DL universe (though contains some amusing DL references, like Zifnab). I consider it overall better than DL, and it is my all-time favorite fantasy series. The first book is Dragon Wing.