Brings together four volumes with a slipcase. The books are The Conquering Family (1949) The Magnificent Century (1951) The Three Edwards (1958) The Last Plantagenets (1962) George R. R. Martin used these popular history books as a model when writing the Game of Thrones novels, saying, "Costain did a wonderful job on the Plantagenets so I tried to do that for the Targaryens." (Interviewed by Alison Flood, The Guardian, 10 November 2018)