
Ibn Ishaq was born in Medina (85H) and died at Baghdad (152H). He composed his biography during the time of the Abbasid caliph Abu Jaafar Al Mansour (136-150H). There is an interesting story behind the origin of the book. When Ibn Ishaq met Mansour, the caliph asked him to write a valuable book for his son and crown prince Al Mahdi. Ibn Ishaq went and composed a biography of the holy Prophet [PBUH].
Ibn Ishaq's book has long been known among Muslim scientists as Ibn Hesham's biography, because it was he who revised and cited it. Abdul Malek Ibn Hesham Al Hemiari was born in Basra and died at Foustat, Egypt (218H).