If you are interested in Mesopotamian religion, myth, history, or esoteric studies, the following texts are highly recommended. They can be purchased from retailers such as Amazon and AbeBooks, university presses, or acquired via inter-library loan.
Beginning with a general introduction, I recommend the following texts:
A History of the Ancient Near East, Marc Van de Mieroop
The Ancient Near East, James B. Pritchard
The Sumerians, Samuel Noah Kramer
History Begins at Sumer, Samuel Noah Kramer
The Treasures of Darkness: A History of Mesopotamian Religion, Thorkild Jacobsen
Religion in Ancient Mesopotamia, Jean Bottéro
Ancient Mesopotamian Religion and Mythology, Wilfred G. Lambert
For mythology and reference, I recommend the following texts:
Gods, Demons and Symbols of Ancient Mesopotamia: An Illustrated Dictionary, Jeremy Black & Andrew Green
A Dictionary of Ancient Near Eastern Mythology, Gwendolyn Leick
Sumerian Mythology, Samuel Noah Kramer
Before the Muses: An Anthology Of Akkadian Literature, Benjamin R. Foster
The Harps that Once…: Sumerian Poetry in Translation, Thorkild Jacobsen
The Literature of Ancient Sumer, Jeremy Black
Festivals and Calendars of the Ancient Near East, Mark E. Cohen
For selected mythology, I recommend the following texts:
Inanna, Queen of Heaven and Earth: Her Stories and Hymns from Sumer, translated by Diane Wolkstein & Samuel Noah Kramer
Love Songs in Sumerian Literature: Critical Edition of the Dumuzi-Inanna Songs, Yitzhak Sefati
Princess, Priestess, Poet: The Sumerian Temple Hymns of Enheduanna, Betty De Shong Meador
Inanna, Lady of Largest Heart: Poems of the Sumerian High Priestess Enheduanna, Betty De Shong Meador
Ishtar, Louise M. Pryke
Myths of Enki, the Crafty God, Samuel Noah Kramer
The Healing Goddess Gula, Barbara Böck
The God Ninurta in the Mythology and Royal Ideology of Ancient Mesopotamia, Amar Annus
For more information concerning magic and ritual, I highly recommend the following texts:
Witchcraft and Magic in Europe, Volume 1: Biblical and Pagan Societies, Frederick H. Cryer & Marie-Louise Thomsen
Mesopotamian Magic, I. Tzvi Abusch
Mesopotamian Witchcraft, I. Tzvi Abusch
The Magical Ceremony Maqlû, I. Tzvi Abusch
Corpus of Mesopotamian Anti-Witchcraft Rituals: Volume One, Daniel Schwemer & I. Tzvi Abusch
Corpus of Mesopotamian Anti-Witchcraft Rituals: Volume Two, Daniel Schwemer & I. Tzvi Abusch
The Witchcraft Series Maqlû, I. Tzvi Abusch
Magico-medical Means of Treating Ghost-Induced Illnesses in Ancient Mesopotamia, Jo Ann Scurlock
Healing Magic and Evil Demons: Canonical Udug-hul Incantations, Markham J. Geller
Forerunners to Udug-Hul: Sumerian Exorcistic Incantations Book, Markham J. Geller
The Cults of Uruk and Babylon: The Temple Ritual Texts, Marc J. H. Linssen
Pazuzu, Nils P. Heessel
Lamaštu: An Edition of the Canonical Series of Lamaštu Incantations and Rituals and Related Texts from the Second and First Millennia BC, Walter Farber
Deliver Me from Evil: Mesopotamian Incantations, 2500-1500 BC, Graham Cunningham
Mesopotamian Protective Spirits: The Ritual Texts, F. A. M. Wiggermann
Ur III Incantations from the Frau Professor Hilprecht-Collection, Jena., Johannes J. A. van Dijk & Markham J. Geller
Surpu, A Collection of Sumerian and Akkadian Incantations, Erica Reiner
The Akkadian Namburbu Texts: An Introduction, Richard Caplice
Extensive online resources are available through the following sites, which are free for use by the public:
The Electronic Text Corpus of Sumerian Literature:
The Open Richly Annotated Cuneiform Corpus (ORACC):
Rod & Ring 