This review reminds me of another biography that has a similar problem. Very little is also known about a bloke called Yeshua who lived about 2000 years ago. Even today many are still "tearing their hair" in frustration over who the actual person called Yeshua really was.

The problem started about 50 years after he was brutaly murdered by the state. Some of his followers decided to write down the experiences of those who had actually walked with him those many years ago. These writers were Greek, not Jews as was Yeshua, so some of the translations were somewhat unclear.

A decade later, other writers added to it, modified some of it and interpreted it more with Greek thoughts. Another decade and another revision, keeping most of the earlier works. Then a bit later  another "good news" was written that changed markedly the nature of Yeshua. Based more on Greek philosophy than Jewish understanding of God, they re-interpreted Yeshua to become the "word" of God.