Is the Father of Jesus the God of Muhammad? is not the best title, but author Timothy George (an editor of Christianity Today) not only answers that question but helpfully explores the essential differences between Islam and Christianity. Dr George writes not to arm Christians with material for arguments, but to encourage understanding of Islam and compassionate interaction with Muslims.
Is the Father of Jesus the God of Muhammad?: Understanding the Differences Between Christianity and Islam by Timothy George (Grand Rapids, MI: Zondervan; 2002) 139 pp. + reading suggestions + glossary + notes.