Reddit mentions of The Union of Isis and Thoth: Magic and Initiatory Practices of Ancient Egypt

You've probably heard of the Egyptian Book of the Dead, known to the Egyptians as the Book of Going Forth by Day, said to have been written by Thoth, God of Wisdom, "from his own fingers". This is the most important surviving text on Egyptian Magic, a complete grimoire of spells, prayers, hymns and incantations used by the ancient priesthood to connect with the Divine and prepare the soul to travel the Neterworld.

The text itself has enormous historic and spiritual value, but it doesn't exactly explain how a modern magician is supposed to use it. To provide context: try the works of Normandi Ellis, who provides an initiated translation of the text in Awakening Osiris, an explanation of the mythical and magical context of the Egyptian gods (Neteru) in Imagining the World into Existence, and the magical initiatory system of the ancients in The Union of Isis and Thoth.

Thelemic Magick has a connection to Egyptian Magic via the transmission of the Book of the Law. This is the basis for much of the the magical system developed by Aleister Crowley in the A∴A∴ and OTO. Again, this holy book of Thelema is complex and does not provide a useful guide to the beginner on the practice of Thelemic Magick. A book like Maat Magick offers a nice practical system for working with the Egyptian Neteru in the spirit of Thelema.