Muhammad Sholahuddin is a spiritual inspirer, spiritual leadership trainer and a lecturer of Islamic Economics in Muhammadiyah University of Surakarta (Central Java, Indonesia). Besides, he is also a writer. He writes five books of Islamic Economics. He is now finishing his PhD in International Islamic University of Malaysia. He had his master’s degree in University of Indonesia and his bachelor’s degree in State University of Surakarta (Central Java). He is happy with a wife and four children now. (e-mail: [email protected])