I have one copy of the audiobook 'Discovering the Will of God' by Marilyn Hickey.  No ISBN, but published by Marilyn Hickey Ministries of Denver, CO.   Jacket copy reads:

"Don't make another important decision...  until you've heard these tapes by Marilyn Hickey!  Do you know the 1-2-3 checklist for God's clear leading in every situation?  Face challenges more confidently -- walk in the strength of knowing God's will!  2-tape set"

2 tapes, 2 credits, please.