Complex sentence: He travels to Kansas with his childhood friend Harper Lee, the author of To Kill a Mockingbird.Capote sets about interviewing those involved with the victims, the Clutter family, with Lee as his go-between and facilitator.
Split into simpler sentences: He travels to Kansas with his childhood friend Harper Lee, the author of "To Kill a Mockingbird." Capote sets about interviewing those involved with the victims, the Clutter family, with Lee as his go-between and facilitator.