Abu sadeq solaym bin Qays was a companion of Imam Ali(p.b.u.h).He has been mentioned by Al.nejashi(the shiite bibliographer) among the first gtoup of the shiite authors .He also mentions about his book along with its authorities . I have to add that solaym bin Qays reports in this book what he learnt from Imam Ali(p.b.u.h) and other prominent companions of the Holy prophet of Islam(p.b.u.h) Described by :Dr.M.R.eftekharzadeh.