Uncertain Voyage — Dorothy Gilman

LIFE AT RISK

With a broken marriage and a nervous breakdown barely behind her, Melissa sails for Europe, reluctantly and absolutely on her own. When a strange traveler urgently asks her to deliver a book to a secret address, Melissa apprehensively agrees--much against her better judgment. Actually, she's half hoping she'll forget the entire unsettling incident and will find the book still packed away when she finally returns home .

But Melissa is unable to completely dismiss the episode. She realizes she's been followed to Copenhagen, Paris, and even into Majorca, where she's to deliver the package-should she be so uncharacteristically bold. As free-floating anxiety turns to terrified dread, and her life is endangered, Melissa discovers something extraordinary about herself, something the might never have suspected'... .