In *Mother Daughter Sister Stranger*, USA Today bestselling author of psychological thrillers Hank Phllipi Ryan tells the intriguing story of Eliza Ramsey, who finds herself caring for her young niece, Piper, after her mother - Eliza's sister - goes missing. Years earlier, the sisters lost their parents in a fiery plane crash, in which only the girls survived. On the day Eliza's sister, Bea, was supposed to pick up Piper, she fails to show up, coincidentally around the 11th anniversary of their parents' deaths. As Eliza delves deeper into the mystery of her sister's disappearance, she uncovers dark truths from their past that may reveal what happened to Bea. Amazingly, Ryan, who has written 17 thrillers, begins each of her novels without an ending in mind. She remarked, "It's just as much a surprise to me as it is to readers what becomes and what turns out to be the truth in my stories... I start out with no outline, with just a gorgeous little gem of an idea that my writer brain has decided will hold the fullness of a novel. In this case, I started with two sisters who have an unbreakable bond because they are the sole survivors of a small plane crash that killed their parents eleven years ago, a secret manuscript, a missing mom, and a frightened daughter, and a sister who is in desperate search of a happy ending, and I thought okay, here we go... So I just type the words 'Chapter One,' and I just see what happens."
Regarding her many novels, Ryan has written both series books and standalones. In her opinion, standalones are particularly fun to write because they provide more opportunities to create suspense and prevent readers from discovering the mystery too soon. Ryan noted, "A series author goes into a series knowing that her readers know that the suspense cannot come from the mortality of the main character... and so that's a challenge to make a series novel be supremely suspenseful... the main character cannot die. However, in a standalone, anybody can be good and anybody can be bad, and anyone can be lying and anybody can start out to be good and turn out to be bad, or start out to be bad and turn into be good, and anybody can be guilty and anyone can die... but wow, you can do anything you want in a standalone, and whenever I write one I think, okay readers, watch me now because you will never be able to figure out what's going to happen."