"Shades" is a series of short novels that don't short change on drama, pace, quality of writing or style.

Its ideal for readers who may find traditional teen novels too daunting, but still crave the excitement of clever plot lines, well-rounded characters and fast-paced writing.

In "Virus", every aspect of Penna's life is controlled for her: a computer programme tells her when to get up, eat, sleep.

But one day the programme goes wrong. Suddenly Penna and her new friend, Veeka, don't know what to do.

Can they trust the mysterious Queltus who alone seems to know what is happening?

It seems a virus has been put into the programme. A virus which could destroy the earth...