The Secret in Vault 13 is an original Thirteenth Doctor novel by bestselling author David Solomons.

At a sinister school, graduation means death. A mystery is lurking beneath a quiet London street and a desperate plea for help is delivered by… a potted plant. The galaxy is in terrible danger and only a Time Lord can save it. But to do so, the Doctor must break into the ancient galactic seed vault. And at its heart lies a secret.

Vault 13 has remained unopened for millions of years and is located on a remote and frozen world from which nobody has ever returned alive. Can the Doctor and her friends Yaz, Ryan and Graham uncover the shocking secret in Vault 13?

The Secret in Vault 13 is available now with an RRP of £6.99. Thanks to BBC Children’s Books we’ve got FIVE copies to give away. If you fancy the chance to win one, correctly answer the following question:

TERMS AND CONDITIONS:

The competitions open on Thursday 15 November and close at 23.59 on Wednesday 13 December. One entry per person. The competitions are not open to employees of DOCTOR WHO MAGAZINE or anyone else connected with DWM, the printers or their families. Winners will be the first correct entries drawn after the closing date. No purchase necessary.DWM will not enter into any correspondence. Winners’ names will be available on request. Entrants under 16 years of age must have parental permission to enter.