Imam Muslim is one of the foremost preservers of ahadith of the Prophet. His book comes second only to Sahih al-Bukhari in terms of authenticity according to majority of scholars. It is considered to be better than Sahih Bukhari in terms of organization and repetition according to some scholars of Islam. It is the second in the collection of 6 books called "Sihah Sittah" or "6 most authentic books". Imam Muslim took painstaking efforts in preserving the words/actions/sayings & approvals of the Prophet. He has mostly used 4-5 narrators in the chain of transmission although there are a couple of hadith containing 3 narrators. Imam Muslim was a very good student of Imam Bukhari and some of his Shuyukhs, although he did not narrate from Imam Bukhari too much, thus reducing the number of narrators.