Vanessa A. Jackson Austin. Bloomington, Ind.: AuthorHouse, 2009. 124 pp. (Paperback). If you are looking for a book that challenges your spiritual walk and summons you to go deeper in your faith, this is not the book for you. But if you are looking for encouragement and an uplifting spiritual jaunt, then “Refreshments for the Heart: God’s Treasure Chest” may…