[1] Like Enid Blyton's earlier creation, Malory Towers, Trebizon is in Cornwall.
The novels follow the protagonist Rebecca Mason from when she joins the school in the second form through to the end of her fifth year.
The Encyclopaedia of Girls' School Stories describes the books as "extremely popular", "modern" but in the tradition of girls' school stories and as selling well.
[1] The Encyclopaedia notes that Trebizon is the longest school story series published since the 1960s.
[1] The series has been reprinted by Egmont Books, with illustrations by Lucy Truman.