The Book of Northern Qi (), is one of the Twenty-Four Histories and covers the Northern Qi Dynasty. It was written by the Tang dynasty historian Li Baiyao (æÂÂç¾èÂÂ¥) and was completed in 636. It is listed among the official Twenty-Four Histories of China. The original book contained 50 chapters but it was found during the Song dynasty that only 17 chapters were intact. The rest are lost.