Diana Peterfreund has been a costume designer, a cover model, and a food critic. Her travels have taken her from the cloud forests of Costa Rica to the underground caverns of New Zealand (and as far as she’s concerned, she’s just getting started). Diana graduated from Yale University in 2001 with dual degrees in Literature and Geology, which her family claimed would only come in handy if she wrote books about rocks. Now, this Florida girl lives with her husband and their puppy in Washington D.C., and writes books that rock Her first novel, Secret Society Girl (2006), was described as “witty and endearing” by The New York Observer and was placed on the New York Public LIbrary’s 2007 Books for the Teen Age list. The follow-up, Under the Rose (2007) was deemed “impossible to put down” by Publisher’s Weekly, and Booklist called the third book, Rites of Spring (Break) (2008), “an ideal summer read.” The final book in the series, Tap & Gown, will be released in 2009. All titles are available from Bantam Dell. She also contributed to the non-fiction anthologies, Everything I Needed to Know About Being a Girl I Learned from Judy Blume, edited by Jennifer O’Connell (Pocket Books, 2007), The World of the Golden Compass, edited by Scott Westerfeld (BenBella Books, 2007), and Through the Wardrobe, edited by Herbie Brennan (BenBella Books, 2008). Her first young adult novel, Rampant, an adventure fantasy about killer unicorns and the virgin descendents of Alexander the Great who hunt them, will be released by Harper Collins in 2009. When she’s not writing, Diana volunteers at the National Zoo, adds movies she has no intention of watching to her Netflix queue, and plays with her puppy, a Nova Scotia Duck Tolling Retriever named Rio.

Cecily von Ziegesar is the #1 New York Times bestselling author of the Gossip Girl novels, upon which the hit television show is based. Cecily von Ziegesar was born in New York City. Her childhood dream was to grow up to be a ballerina; she began lessons at age 3 and auditioned for the School of American Ballet at age 8, but was rejected. As a teenager, von Ziegesar commuted to Manhattan at 6 a.m. to attend the Nightingale-Bamford School. After graduating from Nightingale, von Ziegesar attended Colby College before spending a year in Budapest working for a local radio station. Von Ziegesar returned to the United States to study creative writing at the University of Arizona, but dropped out shortly thereafter. Back in New York, while working at book-packaging firm Alloy Entertainment, von Ziegesar became inspired to create the Gossip Girl series, which follows the lives of privileged teenagers in New York. The series climbed to the top of The New York Times best-sellers list in 2002. A spin-off series, The It Girl, made the list in 2005. The Constance Billard School for Girls in Gossip Girl is based upon an exaggerated version of von Ziegesar's alma mater, Nightingale. She also culled events from the book from the lives of her extremely wealthy friends, as well as her own life as a perpetual gossip. She lives in Brooklyn, New York with her family.