The Arm of the Starfish
Madeleine L'Engle
 The plot centers on a young marine biology student named Adam Eddington, who travels to the remote island Gaea off the coast of Portugal for a summer job working for a famous scientist, Calvin O'Keefe. Even before he leaves JFK airport, Adam is approached by Carolyn ("Kali") Cutter, the beautiful, well-traveled daughter of a rich American industrialist living in Europe. She warns Adam against yet another passenger, Canon Tallis. Tallis is accompanying Calvin O'Keefe's eldest daughter, 12-year-old Polly O'Keefe, to Geneva, but bad weather and mysterious dangers derail those plans. Instead, Adam finds himself shepherding Poly on a short flight from Madrid to Lisbon. When Poly uses the restroom during the flight, she seems to disappear from the airplane completely, and the flight crew denies she was ever on board. Kali's father, Typhon Cutter, later enables Adam to rescue Poly from her kidnappers, deepening Adam's confusion about whom to trust. As the plot unfolds, it becomes clear that at least two different factions have equally strong but differently motivated interests in Dr. O'Keefe's research on organ regeneration. Adam faces a number of ethical dilemmas as he is forced to choose between these factions. Eventually Adam realizes that the O'Keefes are the ones who care about "the fall of the sparrow," as their friend Joshua Archer puts it, a Biblical allusion to caring about others, even the seemingly weak and unimportant. Adam wants nothing further to do with Kali and her ruthless father, but the O'Keefes ask him to make a date with Kali anyway, so that Adam can act as a double agent, passing along fake research papers to the Cutters and smuggling the real ones out to trusted people in Lisbon. Adam reluctantly agrees. This plan is complicated, however, by Kali's unexpected claim that she has learned of her father's perfidy, and wants Adam to protect her and keep her confidences. Adam's attempt to do so makes it nearly impossible to pass on the real papers, hampered as he is by Kali's presence and spies from both sides. Eventually Joshua comes to Adam's rescue, but is shot dead; and Adam learns that Kali was acting on her father's behalf all along. The Cutters are not arrested. Later, Adam goes back to the Cutters' hotel to retrieve his passport from Kali. Playfully, she makes him chase her into the ocean, where she is attacked by a shark. Adam uses a special knife Poly gave him to fight off the shark and get Kali to shore. O'Keefe uses his experimental knowledge about limb regeneration to help Kali.