query: What was the first book in the Pretty Little Liars series?
passage: Pretty Little Liars (book series)
Pretty Little Liars is a series of young adult novels by Sara Shepard. Beginning with 2006's initial novel of the same name, the series follows the lives of four girls– Spencer Hastings, Hanna Marin, Aria Montgomery and Emily Fields.
passage: List of Little House on the Prairie books
Stories about Laura's great-grandmother, Martha Morse Tucker, written by Melissa Wiley:Stories about Laura's grandmother, Charlotte Tucker Quiner written by Melissa Wiley:Stories about Laura's mother, Caroline Quiner Ingalls written by Maria D. Wilkes (vols. 1–4) and Celia Wilkins (5–7):Stories about Laura, written by Laura Ingalls Wilder:"Little House: The Laura Years" is also the title of one 5-volume boxed set published in 1994, which comprises volumes 1 and 3–6. Thus it features the Ingalls family until Laura is 14 years old. The second-published Little House book, "Farmer Boy" features Almanzo Wilder at ages 8 to 10 in upstate New York. None of the Ingalls family appears in it, and Almanzo Wilder does not otherwise appear in the series until late in the sixth book, so "The Laura Years" has some merit as title or subtitle of this 5-volume selection. The box cover displays headings "The Early Years Collection: A Special Collection of the First Five Little House Books". Only months later, all 9 novels were issued as a boxed set, "Little House Big Adventure" (Harper, May 1994), with numerals 1 to 9 on the spine—in the sequence published, and listed here; that is, with "Farmer Boy" numbered 2.