Malorie Blackman

Cameron, a 13-year-old boy whose heart is failing. The only possible solution is an experimental transplant operation in which he's given a pig's heart. His father is determined to try anything to keep him alive, but his mother is not so sure.

When an inventor's son learns that his father has been kidnapped, he searches for a clever contraption that can save his dad’s life.

The Doctor is a Time Lord: a 900 year old alien with 2 hearts, part of a gifted civilization who mastered time travel. The Doctor saves planets for a living—more of a hobby actually, and the Doctor's very, very good at it.

In an alternate history where black “Cross” people rule over white “Noughts”, young couple Sephy and Callum are divided by their colour but united by love.