Complex sentence: The first of the three scheduled books, "The Wards of Faerie", was published on August 21st 2012, with the following books scheduled for March 2013, and September 2013, respectively.
Split into simpler sentences: The first of the three scheduled books, "The Wards of Faerie", was published on August 21st 2012. With the following books scheduled for March 2013, and September 2013, respectively.