At the annual Charlesbridge open house at headquarters in Watertown, Mass., earlier this month some 27 authors and illustrators, including Jane Yolen, Brian Lies, Kathryn Lasky, Ralph Masiello and David Biedrzycki, attended along with booksellers, librarians and teachers. Among those celebrating the publisher's 20th anniversary: (from l.) Masiello; Brent Farmer, Charlesbridge president and publisher; Mary Ann Sabia, Charlesbridge v-p and associate publisher; Lies; and Biedrzycki.