A Question of Existence: Great Questions, Great Answers (Question Of) By Butler, Amy (ILT), Butler, David (EDT), and Butler, Amy (EDT) Books / Board & Rag Books Books › Reference › General ISBN: 1570716811 / Publisher: Sourcebooks, Inc., February 2001 Price Starting at $4.99 Free Shipping Send to a friend Add to Wishlist Below is a list of products arranged by condition. Select the quantity of the product you desire and click the "Add" button. Used - Very Good Very Good condition. A copy that may have a few cosmetic defects. May also contain a few markings such as an owner’s name, short gifter’s inscription or light stamp. $4.99 1 in Stock at Warehouse Quantity Add Free Shipping to continental U.S. OR $1.00 per item discount if shipped to store. Reviews Goodreads reviews for A Question of Existence: Great Questions, Great Answers (Question Of)