The Tower Secret, witten by Lilian Garis. From the Melody Lane Mystery Stories series featuring teen detective Carol Duncan by Garis. Hardcover book, 241 printed pages, published by Grosset & Dunlap New York in 1933.
No dust jacket. Book has some wear along the bottom edge of the cloth spine and bottom edge of the front cover, and there is a name written in pencil on the title page and a 'merry Christmas 1939' message written on a blank page at the beginning of the book. Inner pages are in very good condition with some yellowing due to age.
From the book: "The winking lights flashing from the old tower on the grounds of the Bonds' new home defy explanation..."