Isis Unveiled, Vol. 1 Overview, Blavatsky

The presentation of Blavatsky's Isis Unveiled may give the impression that the work is loosely organized, but as Michael Gomes has pointed out, a closer reading shows that this is not necessarily the case; the text has a clear structure and coherence, although, due to the complexity and density of the writing, the structure may not be easily discernible. The chart below attempts to show a clearer outline of the work:

For a more detailed summary, see here. 

Introduction	Preface – (v-viii) Before the Veil (x-xlv) Platonism and Indian philosophy. 1 Magic, Sacred Mathematics and the Doctrine of Cycles
Science and Spiritualism	2 Spiritualistic phenomena and occult explanations 3 Scientific discoveries and investigation of spiritual phenomena 4 Religious and Scientific views regarding spiritualistic phenomena;
Spirit, Force and Matter Theoretical Practical	5- Spirit, force and matter; creation and human evolution ; the astral light 6 – Paracelsian explanations of supernatural and psychic phenomena
Universal Magnetism Theoretical Cosmic	7-  Magnetism as Universal Force and source of Magic 8 – Spiritual Aspects of Cosmology, Astronomy, and Astrology
Reincarnation, pre-natal and post-mortem experience	9 The evolution of the soul , the after-life and Spiritualism 10 –The Body/Soul Relationship – Elementals, Spiritualism and Reincarnation 11 –Esoteric Aspects of Embryology, the Will, and Imagination 12 –The After-Life and Esoteric Aspects of Vampirism 13 The After-Life: After-Death Revival and Alchemy
Spiritual Evolution and Anthropology Ancient Civilisations and Atlantis	14–Egypt, Atlantis and Sacred Architecture 15 –India, Atlantis and Eastern Magical Knowledge