Death Gate Cycle
This is the first book of the Death Gate Cycle. If you like fantasy, I highly recommend this book. If you have not already read several fantasy books, i recommend their other series, Dragonlance, first.
In this book, humans, elves, and dwarves are all fighting for control of water, a resource very rare on Arianus. Also, who is the mysterious Haplo and what is this labyrinth that he comes from?