At86,writerRobertCaroisworkingtocompletethefinalvolumeofhismasterpiece,“TheLyndonJohnsonYears“;itseditorRobertGottlieb,91,waitstoeditit.Thisuniquedoubleportraitrevealstheworkhabits,quirks,andprofessionaljoysofthesetwointellectualsattheheightofajourneythatconsumedtheirlives,andimpactedgenerationsofpoliticians,activists,writersandreadersaaa