Complex sentence: Part issue, also known as "serialized publication" had long been used by printers and publishers--an edition of Foxe's Book of Martyrs was issued in three-penny installments in 1732.
Split into simpler sentences: Part issue, also known as "serialized publication" had long been used by printers and publishers. An edition of Foxe's Book of Martyrs was issued in three-penny installments in 1732.