book -Sahih Muslim- The author muslim ibn al hajjaj - full title: - Al Musnadu Al Sahihu bi Naklil Adli is one of the Kutub al-Sittah - six major hadith collections - in Sunni Islam , It is highly acclaimed by Sunni Muslims and considered the second most authentic hadith collection after Sahih al-Bukhari It was collected by Muslim ibn al-Hajjaj, also known as Imam Muslim.