There are other Spirit of Prophecy based "study guides" available from other sources. These, however, are simply "study guides" and not "Bible study guides." A "study guide" will ask a question and point the student to find an answer in a book other than Scripture for the answer. Our guides are "Bible study guides"---always pointing the student to the Scriptures alone for the answer. Our format is to ask a question, provided a Bible passage to reference for the answer, then the Spirit of Prophecy is inserted in the guide as commentary. No additional book is required to accompany the guide except the Bible.