From the back cover:

"Exploring the very edge of the known universe, the Doctor, Leela and K9 discover a group of astronauts searching for the lost gene bank of Minyan race. During the perilous voyage, the astronauts' craft plunges into the heart of a recently formed planet, wherein an awesome secret is hidden.

How will the Minyan quest end?

What must the Doctor wrest from the Heart of the Oracle?"

This was Bill Donohoe's first contribution to the ongoing series and the artist is credited on the back cover. Alongside Tom Baker as the fourth Doctor, his cover shows Alan Lake as Herrick and an aged Imogen Bickford-Smith as Tala. This was the only cover art ever produced for Doctor Who and the Underworld.

This copy has on the cover the original Target coloured roundel logo.

RELEASE NOTES:

There was a shopping trolley sitting outside the front door of the post office when I was there and I dropped this book into it.