KenM said:
I have the 3rd edtion Psionic book. How much has changed in the new 3.5 expanded book?
Quite a bit. For one thing, there is now a chapter on PC races, giving a total of eight psionic races (four new to this edition, four that we've seen before).
There are now four psionic classes; not just the psion and psychic warrior, but also the soulknife is a base class now, and the wilder, who is supposed to be the intuitive psionicist...like a psionic sorcerer.
There are more prestige classes, feats, and (IIRC) there is also epic psionic treatment. In addition there are also expanded powers and psionic items.
The monsters got much better treatment here. For one thing, there is now a subtype ("Psionic") for psionic creatures, which is just to indicate that they use powers. Also, psionic abilities that don't use power points use "psi-like" abilities, not "spell-like". There are also psionic versions of established creatures (such as psionic mind flayers).
Psionic combat is gone, completely.
The rules on magic-psionic transparency have been expanded also. And there are sections with a few magic spells and domains that affect psionics, and two deities with psionics as part of what they deal with.
Enough so its worth buying?
I certainly think so.
Also, do you need the new psionic book for Ebberron(SP)?
In a word, no.
Eberron makes mention of psionics (and its definately doing so in the 3.5 manner) but there's nothing that even remotely requires the book. You'd have no problems at all running a nonpsionic
Eberron campaign setting.