Ahmad ibn Hanbal (Sirah A-immah al-Madhahib al-Arba'ah)

An excellent biography of Imam Ahmad ibn Hanbal, the fourth of the Imams from which the 4 great legal schools were built. The biography is very well constructed, very informative, easy to read. All sources are mentioned at the bottom of the page.

The edition also looks great, with a common design for the 4 Imams to make a beautiful collection of biographies.