Premise: Lena "Lenny" Kaligaris is a fictional character in "The Sisterhood of the Traveling Pants", a best-selling series of young adult novels by Ann Brashares. In the 2005 film version of the first book, and the 2008 sequel, "The Sisterhood of the Traveling Pants 2", she is portrayed by Alexis Bledel.
Hypothesis: Lena "Lenny" Kaligaris appears in at least two books in the series.