Complex sentence: It was edited by Sherman's younger son, Robert J. Sherman and was published in 2013 by AuthorHouse Publishers of Bloomington, Indiana, a year and a half after the author's death in 2012.
Split into simpler sentences: It was edited by Sherman's younger son, Robert J. Sherman and was published in 2013 by AuthorHouse Publishers of Bloomington, Indiana. Publication occurred posthumously, one and a half years after the author's death in 2012.