List of The 39 Clues characters
Nellie Gomez (from Boston, Massachusetts) is Amy and Dan Cahill's au pair. She is an aspiring chef and musician. She is considered as Amy and Dan's guardian throughout their travel. Throughout the books, she is the children's only trusted adult, until they learn she is a spy (hired by Grace Cahill). In the sixth book, she is revealed to be a trained pilot. She was later in the series granted active Madrigal status. Her card is No. 244. In Cahills vs Vespers she is abducted by the Vespers along with Reagan Holt, Fiske Cahill, Phoenix Wizard, Ted Starling, Natalie Kabra and Alistair Oh
Mystery (novel)
Together with "Koko" and "The Throat", "Mystery" forms a series of novels often referred to as the "Blue Rose Trilogy." Though the novels feature similar themes and many of the same characters, they do not take place in strict continuity with each other; for instance, the main character of "Mystery", Tom Pasmore, goes on to appear in "The Throat" and two other novels, but a major element of Tom's backstory- a childhood accident that left him hospitalized and incapacitated for several months- is transplanted to the main character of those novels, a writer and Vietnam veteran named Tim Underhill. A similar accident actually happened to the author himself as a child.