Shelf Life: The Call to Conversion Darren pitches for the hard-hitting book, The Call to Conversion, by Jim Wallis in August’s podcast. Is it a classic? Read more about Jim Wallis on The Sojourners website or Like his Page on Facebook. Leave a Reply Cancel reply Your email address will not be published. Required fields are marked *Comment Name * Email * Website Notify me of follow-up comments by email. Notify me of new posts by email.