The Great Elemental Netbook is intended as a supplement to [adventuring in the Inner Planes]. It gives information about the inner planes, and about things connected to them.
The Great Elemental Netbook was distributed in two parts only to manage the size of the document. The material is organized topically, and the division occurs at a logical place; however, the materials are intended to be used together. The book makes frequent reference to The Inner Planes and in many ways is a major expansion to the official product.