"The Kinslayer Wars", but Douglas Niles is probably one of the better Dragonlance books out there. It has its share of action and adventure. Though, as the story nears its end, Niles seems to kill off characters just to keep the plot moving. Granted, it represents actions that needed to take place, yet many of the deaths seem to be unjustified. But, all in all, this book is enjoyable to read, albeit a little depressing towards the end. It has a lot of action, much of the book centering around pivitol battles and situations during the Kinslayer Wars. This book isn't that long, only about 300 or so pages so it is a quick read.
If you want to learn more about the Elven past, this book and series is what you need. It reveals pivitol information that deals with the seperation of the Silvanesti elves, and the reasons for Kith-Kanan's ideas of founding a new nation for himself, the Qualinesti. If you can get a hold of this book or series, check it out. It is worth the read.