Want to go deeper into the Enneagram? Ian Morgan Cron and Suzanne Stabile have created a content-rich companion to their book The Road Back to You. For those who don't yet know their number, it will offer further opportunity to explore the numbers, and for those who already do, it offers an opportunity to reflect on implications for growth.
Simply Christian - A fantastic book written by N.T. Wright on the basics of the Christian faith. Walks through the story of the bible, teaching basic (and important) theology along the way. The link is for a fantastic curriculum.