سير أعلام النبلاء is a book on the science of biographies written by Abu Abdullah Shams al-Din al-Dhahabi who passed away in 748 AH, equivalent to 1374 CE. This book is considered one of the most enjoyable biographical books that readers and researchers can benefit from. It is an abridged version of his massive book "Tarikh al-Islam" (History of Islam). The author has written other useful and beneficial books on the biographies of scholars such as "Mizan al-I'tidal fi Naqd al-Rijal" and "Tadhkirat al-Huffaz," among others. The book covers the biographies of Muslim scholars from the time of the Companions of the Prophet Muhammad (PBUH) to the time of the author.

The book is an excellent reference for scholars and researchers who want to learn about the lives of Muslim scholars. It is well-written and provides comprehensive information on each scholar, including their names, titles, dates of birth and death, and their contributions to Islamic knowledge. The book is available for free on the Android platform, and it is an excellent addition to the library of any Muslim scholar or enthusiast.