Interesting history about the discovery of penicillin and the development of antibiotics and the very important role they played in the second world war. Fleming was a humble, complex and dedicated scientist who predicted that the penicillin mould could be used to kill bacteria. His academic achievements were incredible and the book outlines his studies and the role he - and other scientists - played in developing antibiotics, even in the primitive conditions of the 1930s and 40s. The competition between scientists at Oxford, St Mary's hospital (where Fleming was based) and the Americans is fascinating. Ultimately, penicillin saved - and continues to save - millions of lives thanks to the likes of inquiring minds like that of Alexander Fleming.