The O'Sullivan Twins (by Enid Blyton)

(Amazon UK link) I loved the St Clare’s books by Enid Blyton when I was a child, and reread them regularly as a teenager. So I was delighted to discover in the summer that my seven-year-old granddaughter had discovered them on audio books and was listening to them regularly. At the end of August I re-read ‘The Twins at St Clare’s’, the first in the series, and very much liked the nostalgia as well as the story.
So a couple of days ago I picked up the second in the series, ‘The O’Sullivan Twins’, w...