ThirdWizard said:
(Time machine)
I won't be buying it. Eberron doesn't interest me.
How about master spies who's very skin is a disguise, perhaps they are the results of spell experiementation or Doppleganger half-breeds? (In a world filled with half-elves and half-orcs.) How about barbarians who have such a link to their wild lands they can call upon the powers of their animal totems for extra powers beyond battle rage?
IMHO, the changelings can be dropped in lock, stock and barrel into any game world where dopplegangers exist and a quiet a few that don't. The game mechanics for the race aren't attached to any Eberron specific thing and since the race is so secretive, there's no real need to insert a back story. They've just always been there, in the shadows until a PC is discovered to be one.
Mechanicaly, the shifters require no retrofit and are self contained. If you make them a remote tribe that's recently discovered, you're set. For my style, these two races are "no-brainers" for the most part to fit in any DnD world.
After reading the book, I suggest these two races deserve a second look from most GMs. Then again, I've had DM's who claimed we couldn't play halflings because that race was on an island that was undiscovered so far. I'm sure there are other GMs who perfer to keep similar control on thier race selection.
On the other two races, I admit the other two take a little more forethought to fit into a standard DnD game and YMMV.
As an aside, I love the "Adaption" paragrahs for the PrCs. They give good advice on how to adapt the classes to non-psionic and non-Eberron games. Most of it seems to be common sense, but I've had a GM nix PrCs from WotC's class books when they use Greyhawk names. .... "I don't have Hextor as a god in my game."