Malorie Blackman, possibly best known for the Noughts & Crosses series, has been announced as the seventh author in the 50th Anniversary eBook series. The book focuses on the Seventh Doctor, as played by Sylvester McCoy, and Ace and features the return of the Daleks. The synopsis, which you can read below, shows that the plot features supposedly "Good" Daleks, which have been featured more than once in the extended universe, the most recent example being The Dalek Generation.

When the TARDIS lands on Skaro, the Seventh Doctor and Ace are shocked to discover the planet has become the universal centre of learning, populated by a race of peace-loving Daleks. Ever suspicious of his archenemies' motives, the Doctor learns of a threat that could literally tear the universe apart...

Malorie Blackman commented: "I have always loved Doctor Who - from the time I was a child and the Daleks used to make me run and hide behind the sofa, to Saturday morning pictures when I first saw the Doctor Who films featuring Peter Cushing, right up to the current Doctor with Matt Smith. So when I was asked to write a Doctor Who story featuring the seventh Doctor, Sylvester McCoy, I didn't even need to pause to think about it. My answer was an immediate yes. I've always found Sylvester McCoy's Doctor fascinating because of the way his character developed from a bit of a clown to a Doctor with a more Machiavellian streak. In my story, the Doctor's actions are responsible for a universal catastrophe which forces him to face up to his own fears and prejudices."

Malorie Blackman has written over fifty books, including the much acclaimed Noughts & Crosses, and is acknowledged as one of today's most imaginative and convincing writers for young readers. She has been awarded numerous prizes for her work, including the Red House Children's Book Award and the Fantastic Fiction Award. Malorie has also been shortlisted for the Carnegie Medal. In 2005 she was honoured ith the Eleanor Farjeon Award in recognition of her contribution to children's books, and in 2008 she received an OBE for her services to children's literature. She has been described by The Times as 'a national treasure'. Malorie Blackman, has succeeded Julia Donaldson as the Children's Laureate for 2013-2015.

The Ripple Effect will be released on the 23rd for  £1.99, and a video introduction will be released on the 11th.