From publisher blurb:
One of the most common items available, created, or discovered, as treasure is the bag of holding. Though this item is nearly mundane in its rarity, it has a great deal of myth behind it, having a long history that has seen the millennia pass by. Recently several scrolls were brought forth by Silytha apprentice of the necromancer Gul’Lugal shedding light on the mysteries of the creation of the bag of holding as well as several incidents when the bags were used for purposes that may have been a bit beyond the original intent of their creator. Whatever, the case, bags of holding have become an important and valued commodity throughout the world.
This supplement has includes:
Creator of The Bag Of Holding
History of The Bag Of Holding
New Lesser Artifact: Non-Dimensional Robes
New Spells: Dimensional Mine, Two-Dimensional Storage And Two-Dimensional Sword
Variant Rules: Astral Rifts
Variant Rules: Ethereal Bag Of Holding
Variant Rules: Other Containers Of Holding