Book excerpt: Eleven Doctors, eleven months, eleven stories: a year-long celebration of Doctor Who! The most exciting names in children's fiction each create their own unique adventure about the time-travelling Time Lord. 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... Children's Laureate Malorie Blackman puts her own unique spin on the Doctor's incredible adventures through time and space.