Complex sentence: Roberta "Robby" DeBoer later wrote a book called "Losing Jessica" about the case and the DeBoers established a child advocacy group called Hear My Voice that advocates for children involved in difficult custody cases, with a pro adoptive parent angle.
Split into simpler sentences: Roberta "Robby" DeBoer later wrote a book called "Losing Jessica" about the case. The DeBoers established a child advocacy group called Hear My Voice that advocates for children involved in difficult custody cases, with a pro adoptive parent angle.