Duncan's daughter was murdered in 1989 and the case was never solved. The devastating loss shifted her entire career. She stopped writing young adult fiction and began focusing on the crime. Duncan advocated fiercely for her daughter and other victims like her, creating the Resource Center for Victims of Violent Deaths. I really admire her courage in continuing to revisit this dark period in her life so that she could help others in similar situations.
You can read Lois Duncan's obituary here: http://www.latimes.com/local/obituaries/la-me-lois-duncan-20160616-snap-story.html
If you've never read one of her books, I urge you to pick one up and give it a try. She was writing young adult before the term even existed, and decades later I think many of her titles still hold up very well.
Peeking into the archives...today in:
2015: New Releases: June 16th, 2015
2013: The Mermaid of Brooklyn by Amy Shearn
2012: The Royal Historian of Oz by Tommy Kovac and Andy Hirsch
2011: Fashionista Piranha will be on hiatus for a while…
2010: Best Friends Forever by Jennifer Weiner
2009: A Lion Among Men (Wicked #3) by Gregory Maguire