Complex sentence: After Poewe married Irving Hexham the two co-authored "Understanding Cults and New Religions" (1986) and "New Religions as Global Cultures" (1997).
Split into simpler sentences: After Poewe married Irving Hexham the two co-authored a book entitled "Understanding Cults and New Religions" (1986). They also co-authored "New Religions as Global Cultures" (1997).