Subtitle 13th Doctor Novelisation. by Una McCormack, Dan Starkey. But when the Doctor and her friends arrive they find Adamantine under threat. Fearing an invasion is underway, the Doctor must lead an expedition to the surface of the world to save its molten heart.Dan Starkey reads this original story featuring the Thirteenth Doctor, Yasmin, Ryan and Graham, as played by Jodie Whittaker, Mandip Gill, Tosin Cole and Bradley Walsh.Duration- 4 hours 35 minutes approx.