Here is he information from the back cover of the book. I have never read the book, so can't recommend it in any way
The Gift of Healing is the absorbing, though quietly written, report of healing that defies conventional medical explanation. It describes clearly and factually the exceptional histories of dozens of men and women who came to Olga and Ambrose Worrall and left free of their physical afflictions. Refusing all gimmickry and insisting that anyone seeking their help first be examined by a doctor, the Worralls quietly extended the relief of health to thousands. The Gift of healing tells a more personal story as well, the story of two ordinary people given an extraordinary gift and their struggle to come to terms with it and its demand on their lives. There is a strong, insistent note of faith in these pages, for as the Worralls put it, "Spiritual healing, like all healing, is only a technique for achieving wholeness and all wholeness is of God. the Gift of Healing is an inspiring testament of the mysterious power to impart health, increasingly of interest amount people of all faiths. Solid evidence of the unfathomed creative powers in ourselves and in our universe. As one who not long ago looked on spiritual healing as quackery and delusion. I recommend the Gift of Healing to those who still do. Jeffrey Smith Associate Professor or Philosophy and Humanities Stanford University A valuable addition to the literature of healing International Journal of Parapsychology