It is an authoritative book on Hadeeth criticism, classification, compilation and authenticity, provides a wide-ranging coverage of Hadeeth methodology and literature for intermediate and advanced levels of study.
Within this book, author has incorporated 200 small ahadith of the Prophet saws that concern the important matters of the religion, so that the youth can easily become accustomed to the words of the Prophet saws.
Sunan An-Nasai compiled by the the great Imam An-Nasai has the fewest weak ahadith after the two Sahih collections and contains 5761 ahadith, making it as an invaluable addition to ahadith collection.
One of the six most authentic collections of the Ahadith which has 4800 Hadith (selected from a mass of 50,000) divided into many different subjects, each Section containing many Hadith.
His compilation of this Sahih comes second only to Sahih al Bukhari in terms of authenticity according to majority of scholars & is the second in the collection of 6 books called "Sihah Sittah"
With 3956 ahadith, Jami' At-Tirmidi is an invaluable addition to any person's library of hadith collection. It is also considered as the most authentic among the Four Sunan
Indeed it would be no exaggeration to say that to this day most traditional hadeeth scholarship is directly or indirectly based on this work of Ibn Salah