The Guardian Bookshop makes over 180,000 books available with up to 40% discount, as well as highlighting some of our favourite publications in each genre.
Find out more.
On holiday in Cornwall, Simon, Jane and Barney Drew discover an ancient map in the attic of the Grey House, where they are staying with their mysterious Great-Uncle Merry. They know immediately that it is special. But it is much more than just a map.