The fourth part of the series al-La'ali al-Ghawali fi Dhikr al-Sanad al-'Ali (Precious Pearls on the High Chain), a fine series compiled by the author to make these works easy to read and to help revive the reading of the books of the Sunnah, especially in a time of weakened resolve.
The book contains the narrations of Imam al-Bukhari from the Prophet, peace and blessings be upon him, with only three narrators between them: his teacher from the generation after the Successors, then his teacher's teacher from the Successors, then the Companion.