Which book is recommened as the most authentic for the Sirat/biography of the 4 khalifas?

In the Name of Allah, the Most Gracious, the Most Merciful.

As-salāmu ‘alaykum wa-rahmatullāhi wa-barakātuh.

You may refer to the following links:

Abu Bakr (Radhiyallahu Anhu):

https://futureislam.files.wordpress.com/2011/11/the-biography-of-abu-bakr-as-siddeeq.pdf

Umar (Radhiyallahu Anhu):

http://www.masjidtaqwa.org/pdfs/Umar-Ibn-Al-khattab-Volume-1.pdf

http://www.margatemasjid.org/pdfs/Umar-Ibn-Al-khattab-Volume-2.pdf

Uthman (Radhiyallahu Anhu):

https://archive.org/details/TheBiographyOfUthmanIbnAffanrDhun-noorayn.pdf/page/n11/mode/2up

Ali (Radhiyallahu Anhu):

https://futureislam.files.wordpress.com/2012/02/ali-ibn-abi-talib-r-volume-1.pdf  

https://futureislam.files.wordpress.com/2012/02/ali-ibn-abi-talib-r-volume-2.pdf

You can read the book titled ‘Khulfaa-e-Rashideen’, that is translated into English by Mufti Afzal Hoosen Elias (Rahmatullah Alaihi).

You may also listen to the discourses of my beloved teacher, Mufti Ebrahim Desai Saheb, expounding on the biography of the Sahabah (Radhiyallahu Anhum). You can access it online on the following link:

https://darulmahmood.net/2019/12/30/ramadaan-itikaaf-1439-2018/

And Allah Ta’ala Knows best

M. Akhtar

Student Darul Iftaa
South Africa

Checked and Approved by,
Mufti Ebrahim Desai.

(2020-09-30)