Three Cheers, Secret Seven #8 by Enid Blyton

Sale price$12.00
About Meet Peter, Janet, Jack, Barbara, Pam, Colin, and George. Together they are the Secret Seven - ready to solve any mystery, any time!
When Peter and Jack go looking for their lost model aeroplane in an old abandoned warehouse, they find a surprise. Who is living there and why?
Looks like the Secret Seven have another interesting case to solve.