Deadline Hollywood reports that Sherri Saum has joined the STARZ series for at least the first season, which continues the story of James "Ghost" St Patrick's (Omari Hardwick) son Tariq (Michael Rainey Jr.), Tasha (Naturi Naughton) in the first of four STARZ spinoff series, Power Book II: Ghost Saum's Paula Matarazzo is the top investigator and[...]