If you liked the first Hyborean Dragons novela, you will like this one. If you haven't read the first one, go read it now.
Dragon-Child delivers more of what was good in the first book without simply retreading over the exact same stuff. Where as the first novella told us a lot about Therian, this one delves more into Grum, being told exclusively from a limited third person perspective centered on him. It takes place in new settings and is fairly fast paced - just like it should be. The climax of the story ends up being cool and amusing.
My only complaint would be that up until the end of the story, it feels like not much has happened - or rather, not much had happened in the frame of the larger plot. However, it makes up for this in the end, and the feeling is likely in part, only due to the fact that the next book is not out yet.