We know a great deal about Muhammad—or so it seems. Islamic tradition contains an astonishing wealth of information about the founding figure of the Islamic faith, and most historians take for granted that this material is generally reliable.

In his latest book, historian and Islamic scholar Robert Spencer shows that there is no agreement in the earliest Islamic sources about the most fundamental details of this towering figure's life. There are conflicting accounts of key details of his life, including the circumstances and contents of the first revelation he claimed to have received from Allah; the year of his birth; the length of his prophetic career; the name of the angel who supposedly appeared to him; and even his own name.

Muhammad: A Critical Biography takes a detailed look at the Islamic traditions regarding Muhammad and lays bare their contradictions, inconsistencies, and incoherence. Spencer continues the groundbreaking research he began in The Truth About Muhammad and Did Muhammad Exist?, exposing the shocking reality of how shaky Islam's foundations really are. He meticulously explains why competing traditions may have been invented and definitively demonstrates that, contrary to the complacency of establishment historians, the Muhammad of Islam is more legend than history, more fable than fact.