This is an 8.5″ x 11″, 287 pages, printed copy of the Unsearchable Riches Comprehensive Index with spiral binding. The Index includes a topical as well as a scripture reference index for Volumes 1 – 112. This printed book is available in .pdf form for free if you wish to download it. The book itself is updated each year. If you wish to update your current copy, you will need to order a new one.