What is the largest readable encyclopedia-book- on the Prophet's biography?

Books of Seerah (Prophetic biography) differ according to their compilation, importance, and the authenticity of their contents. Some compile accounts of the Seerah without scrutiny, such as "Al-Rawd al-Unuf," "Subul al-Huda wa al-Rashad," and "Al-Seerah al-Halabiyyah." Among the best books in terms of concern for authenticity are "Zad al-Ma'ad" by Ibn al-Qayyim and "Al-Seerah al-Nabawiyyah" by Ibn Kathir, in addition to the works of Dr. Akram Diya al-Umari and Sheikh Safi-ur-Rahman Mubarakpuri, which are considered among the most important writings.