Nancy Tillman is the author and illustrator of the New York Times best-selling picture book On the Night You Were Born and its companion journal, The Wonder of You: A Book for Celebrating Baby's First Year.

Her other books include Wherever You Are: My Love Will Find You, The Spirit of Christmas and Tumford the Terrible. A former advertising executive, Tillman now writes and illustrates full-time. She lives in Tualatin, Oregon.

Eric Metaxas is the #1 New York Times bestselling author of Bonhoeffer: Pastor, Martyr, Prophet, Spy; Amazing Grace: William Wilberforce and the Heroic Campaign to End Slavery; and Miracles. His books have been translated into more than twenty languages.

His writing has appeared in The Wall Street Journal, The New York Times, and The New Yorker, and Metaxas has appeared as a cultural commentator on CNN, the Fox News Channel, and MSNBC. He is the host of The Eric Metaxas Show, a nationally syndicated daily radio show. Metaxas is also the founder and host of Socrates in the City, the acclaimed series of conversations on "life, God, and other small topics," featuring Malcolm Gladwell, Dr. Francis Collins, and N.T. Wright, among many others.

He is a senior fellow and lecturer at large at the King's College in New York City, where he lives with his wife and daughter.