No they are not the most Authentic & there author did't ever claim that. They narrate with isnad/chain with narration or refering to it collecting collection worthy narration. In islam as ordered by the quram & Hadith no narration could be regarded as authentic without proper scrutiny, its haram & more sinful in case related with the prophet.
As far authentucity concern there are very few seerah book that can be mentioned. One such book is from shykh Ibraheem Ali(rh) & other is the seerah book of Muhammad Salih al Munajjid.
Ar Raheequl Makhtum(translated as The sealed Nekter & Asah us Siyar of Abul Barakat Abdur Rauf Danapuri rh. are also mostly authentic & Reliable.
Which book of seerah contains the most authentic narrations?
1 Answer
Honorable mentions: Muhammad: His Life Based on the Earliest Sources: Martin Lings The Life Of Muhammad: by Ibn-Ishaq The Life of the Prophet Muhammad Volume 4: Al-Sira al-Nabawiyya :- Ibn Kathir
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Zeeshan_Ahmed
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A student. Took Islamiat and History as subjects, and greatly interested in Islamic and Indo-Pak history.
A student. Took Islamiat and History as subjects, and greatly interested in Islamic and Indo-Pak history.