One of my favorite books from my childhood was named "Five Go To Smugglers Top". My uncle brought this book back from England on one of his many trips. He knew I enjoyed Nancy Drew, The Hardy Boys and the Bobbsey Twins books and thought I might enjoy a British kids mystery book.
Was he ever right! I love this book with all of the mystery and intrigue. The British sayings and foods mentioned were educational to me as well. It opened up a world beyond my small Southern town. I must have read that book a hundred times.
The Five are three siblings, their cousin and the cousin's dog. The Famous Five tend to find mysteries everytime they are on holiday from school . Their adventures almost always involve secret passageways which really fascinated me as a child.
I happened to mention to a friend of mine in England that I had really loved this book as a child and for my birthday sent me two other books! I quickly devoured them and enjoyed them almost as much as I did when I was child (they are a bit too juvenile for me now LOL).
The original series was written from the mid 1940's to the 1960's so some of the dialogue and activities might be a bit outdated for today's kids. I, however, enjoy the nostalgic value of that aspect of the books. I read that there were more recent books published, but by a different author. Those might be more appropriate for modern kids.