Complex sentence: Rebecca Ruter Springer (November 8,1832--1904) was a 19th-century American author who wrote the famous Christian book "Intra Muros", better known today as "My Dream of Heaven".
Split into simpler sentences: Rebecca Ruter Springer (November 8,1832--1904) was a 19th-century American author. Among her works is the Christian book "Intra Muros", better known today as "My Dream of Heaven".