The half-century of collaboration between political journalist Robert Caro and Knopf editor Robert Gottlieb has resulted in two Pulitzer Prizes in Biography and a host of other book awards. This intriguing documentary from Gottlieb's daughter Lizzie, filmed as Caro looked to mount a fifth and final volume on the life of LBJ, offers an inside look at the give and take between two still-vital industry veterans, and an appreciation for a depth of reportage in danger of vanishing from the national discourse. 112 min. Widescreen; Soundtrack: English.