As an archpriestess of Isis in the Fellowship of Isis, I am always looking for good tools to help introduce people to the Gods of ancient Egypt. The Book of Doors is one such tool.
The Book of Doors gives both a wonderful introduction and a detailed look into the Gods of ancient Egypt, presented as a medium for divination. The authors' heavy emphasis on alchemy as a path for understanding and transformation draws on the long tradition that historically traces that discipline to Egypt. While I do not always agree with their interpretation of the meanings of the Gods, which they sometimes distort to fit their alchemical model, I still find this a useful tool for both divination and for studying the Gods and Goddesses. I recommend it highly as an alternative or backup to your everyday Tarot deck!
I also find the use of a die to select cards to be a wonderful randomizing tool, as opposed to traditional shuffling and other selection methods. They supply an 8-sided die with the deck, along with instructions for using it. Interesting method.