(Shame on Jeff for not mentioning this:)
I think the best explication of Ericksonian Family Therapy is by Carol Lankton and Bill Matthews and I in: Gurman and Kniskern's (Eds.) HANDBOOK OF FAMILY THERAPY VOLUME II, pg. 239, "Ericksonian Family Therapy," Brunner/Mazel, 1991. ISBN # 0-87630-642-3.
Also worth the read is UNCOMMON THERAPY by Jay Haley and the items Jeff mentioned.