I'd use suggest the XPH, Hyperconscious and CompPsi (while its not great, there is some useful material within it). The Psychic Handbook is a slightly different take on the whole business of psionics- as I recall, not entirely compatible with WotC's version.
Hyperconscious has some good PrCls, including one that, to some people, works the way the Soulknife should have worked.
I'd also track down a copy of Dragon #341. In the Class Acts section of that issue, they introduce new Feats for Soulknives, some of which are better thought out and executed than their close analogs in CompPsi.
Hyperconscious has some good PrCls, including one that, to some people, works the way the Soulknife should have worked.
I'd also track down a copy of Dragon #341. In the Class Acts section of that issue, they introduce new Feats for Soulknives, some of which are better thought out and executed than their close analogs in CompPsi.