Secret Seven Mystery by Enid Blyton. Knight Books. Paperback. Illustrated by Derek Lucas. 10th impression 1977. These editions first published in 1971. Book first published in 1957. 96 pages. Used but in acceptable condition. Some age markings. Cover and corners scuffed and sellotape mark inside front cover. A few red felt tip marks on cover. Dimensions: Approximately 18cm x 11cm x 1cm ISBN: 0340148799
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