This is not a biography on the Prophet. This book is an exploration of aspects of the Arabic world before Muhammad, the life of Muhammad and the Islamic world after Muhammad.
I first read this book in 2011. Rereading this during Syawal 2019 I find the most interesting parts of this book is on the entitlement to 4 wives ( Quran 4 : 3} p145, the night journey from the Ka’ba, Mecca to the Al- Aqsa mosque, Jerusalem and then to all 7 levels of heaven { Quran 17 : 1) p. 169 and the choice between wain and milk offered to Muhammad { Quran 47 : 15} p. 173. It would appear from this book that the Quran did not state the choice taken.
For a very readable biography of the Prophet I highly recommend Karen Armstrong ‘s A biography of the Prophet.