In her book Tidrick argues that Gandhi's student life in London was his decisive and formative period where he acquired the ideas which would be put to use until his death.
This point of view differs from more conventional understandings of Gandhi's intellectual inheritance that locates his ideas in Ancient India.
William Dalrymple called her work "Brilliant" and remarked that her research brought certain unexplored dimensions of Gandhi's intellectual life to light such as the influence of occultists of London "she locates the roots of Gandhi’s thought in the lunatic spiritualist fringe of late-Victorian England, among the occultists, high fibre-ists and mediums who flourished in late 19th-century London".
[1] Francis Robinson, Professor of the History of South Asia at the University of London, remarked that her study brought to the front the experimental aspects of Gandhi's life in its milieu which was Victorian.
Not just I, but any serious student of this historical figure, would have more to learn about his outlook from her work than from any other extant study of him —the vast majority of Gandhiana being, to one degree or another, hagiographic.