It is comprehensive, steeped in the sources and objective which is rare in a field where personal covinctions often interfere with narrative. There are some minor works or subjects which I wanted to see better covered but, nevertheless, it is an outstanding achievement. It helped me a lot to penetrate the world of ancient Gnosticism and finally to write and defend a doctoral thesis on it. It will be published in 2000, alas, in Bulgarian. It also stimulated me to begin researching the influence of Gnosticism through the ages which is enormous but much neglected.