13 Little Blue Envelopes is a 2005 young adult realistic novel by American author Maureen Johnson. Set in New York and throughout Europe, the story follows shy, seventeen-year-old Virginia (Ginny) Blackstone on an adventurous journey of acceptance and self-discovery spurred on by her late artistic aunt Peg.
The School Library Journal positively reviewed 13 Little Blue Envelopes, calling it a "quick read" and "the novel drives home the importance of family, love, and the value of connections that you make with people". RT Book Reviews praised Johnson's originality, saying that she "puts an original twist on the genre and leaves some wonderful surprises for the end as well". Booklist wrote that the idea of a young girl traveling alone on an undefined journey "stretches plausibility", but that the book also had "sensitive, authentically portrayed experiences". Publishers Weekly and Kirkus Reviews both positively reviewed the book, with Kirkus calling Johnson's writing "sophisticated and humorous".