The Prophet's''Biography'' occupies great status in the hearts of Muslims, since the beloved Prophet Muhammad, Salla Allahu 'alayhi wa Sallam, is our Guide and a Mercy to Mankind.
Ibn Hisham, May Allah be pleased with him, says that he edited this biography and omitted certain details that were deemed too offensive to Muslims, he removed tales of people before the Prophet Ismail, peace be upon him, and tales of his sons and also a lot of probably unverifiable information (especially Poetry) from Ibn Ishaq's work. This English translation is further summarised by removing the repetitions and chains of narrations so as to make it simpler for the English reader.
Abu Muhammad Abd al-Malik Ibn Hisham, May Allah be pleased with him, was born in Basra and died in Egypt (d 218 AH. ) he edited the biography of the Prophet Muhammad, May Allah bless him and grant him peace, (Sirat Rasullullah) written by Ibn Ishaq (d.151 AH) , which is now lost.
One of the earliest biographies, that is now available in English. This is not the best English translation, but it's currently the only one available of this classic.