5th Dog Let Loose is the second album by rapper Flesh-n-Bone from the rap group Bone Thugs-n-Harmony. The album was released on October 10, 2000 on Mo Thugs Records and Koch Entertainment. Word of the album originally surfaced in 1998 with a different title "Book of T.H.U.G.S." But due to Flesh-N-Bone's incarceration the album wasn't released until three years later with a new name and a new label. Also due to Flesh's incarceration the album was left unfinished.