Stargate Atlantis: Mirror, Mirror (Stargate Atlantis)
An absolutely fantastic read and if more stories like this made it to TV I'm sure Atlantis wouldn't have been cancelled... The story is a bit confusing at first but that just adds to the effect... The idea is that the team discover a Quantum computer which contains the memory of an Ancient, who in the past built a device capable of elimating the Wraith from history.. However they discover too late that this is where everything goes wrong. The universe as we know it is shattered into various realities.
The book breaks down into the 5 main characters.
Teyla - Has grown old with the knowledge of what has happened. She is considered a witch in this reality as she still has the Wraith DNA inside her.
Rodney - Stuck nearly 1,000 years in the past with no memory of who he is. There is also another person with him but I don't want to spoil it for you.
Sheppard - There are actually 2 of Sheppard, the first half of the book is Major Sheppard, we then meet Colonel Sheppard who slowly takes over from the younger Sheppard.
Elizabeth - Again there are 2, one who is crazy, and the other is part of a cult.
And finally my favourite Ronan's story in a timeline where the Atlanteans never had to battle the Wraith. But they are not the loving caring Ancients we all know and love. They also control all of their "army" with an implant in their brain.
All in all it's is an entralling read and I would reccomend Mirror Mirror to any Sci Fi fan. You don't need to be an Atlantis fan to read this book. :)