This book from the outside looks like a normal spell book.  This book has an interior space considerably larger than its outside dimensions. The hole is about 6 inches wide and 8 inches tall. The book can hold up to 150 pounds, not exceeding a volume of 10 cubic feet. The book weighs 2 pounds, regardless of its contents. Retrieving an item from the book requires an action.

If the book is overloaded, pierced, or torn, it ruptures and is destroyed, and its contents are scattered in the Astral Plane. If the book is turned upside down, while on the page with the hole, its contents spill forth, unharmed, but the book must be put right before it can be used again. Breathing creatures inside the book can survive up to a number of minutes equal to 10 divided by the number of creatures (minimum 1 minute), after which time they begin to suffocate.

Notes: Utility, Container