Al-Fasl li al-Wasl - al-Khatib al-Baghdadi (2 vol.)
This is the first book written on a specific area of the science of the hadith, but nevertheless very important, the Mudraj, by the great Imam Muhaddith, al-Hafidh al-Khatib al-Baghdadi. The hadiths mudarraj are those in which a narrator has introduced a remark or speech in addition. It is a high degree of the science of the hadith reserved for the most experienced Muhaddith, as are certain kinds of 'illa, irregularity.
Al-Khatib al-Baghdaadi wrote dozens of books on the sciences of the hadith, be it musnad, books of mustalah, Adab of Muhaddith or Talib, or on narrators.
Al-Fasl lil-Wasl is a must in his field, and he is presented here with a high quality Tahqiq which is the result of a PhD thesis. There is a long introduction to the author, the book and the topic, precious annotations and a very comprehensive research summary (verses, hadiths & athars, names, subjects)