The Mystery at Lilac Inn, Nancy Drew Mystery Stories, number 4 in the series. Author: Carolyn Keene. Hardcover, 180 pages. Publisher: Grosset & Dunlap, no 9504, published in 1961. The back cover of the book has damage on the lower left side (some small tears and rips, see photos) and the front cover has some wear on the top right corner (both outside and inside of cover, see photos). The inside pages and spine are in very good condition.