Mahdi is a historical look at an Islamic figure that is widely respected, but not so widely understood. His importance is not often questioned, but his identity is. Is he a man of the past, is he with us now, or has he yet to be born? We may never know the answer to this question, but one thing is certain, the term 'Mahdi' has led to the founding of many Islamic branches. Some of these branches of Islam struggled to prosper when their founders passed away, and others have grown so large that they are recognized as their own religions altogether. Readers will learn what it means to be the Mahdi, what troubles have arisen due to the Mahdi, and learn of those who have claimed to be this messianic figure of Islamic history.