There's a whole mess of them! Big Book of Baking, Love to Bake, A Bake for All Seasons, Get Baking for Friends and Family, Big Book of Amazing Cakes. https://www.amazon.com/dp/B087D4MZ4F
They should all have "Great British Bake Off" or "Great British Baking Show" as the first part of the title depending on where you live and purchase.
I think the Big Book of Baking is the most popular and "essential" one.