'The Praelium' is the first book in a new fantasy series by Lisa Riddoch. What would you do if you could travel to magical, alien worlds? If you discovered you could move things with your mind, or wield powers of unbelievable strength? That is what two sets of twins find out on their fourteenth birthday. Become immersed in a tale filled with mythical beings, talking wolves and armies of fighting eagles. Born on opposite sides of a world as familiar as the one we live in, orphaned and brought up by relatives, their destiny is dictated by the people in charge of their care. The teenagers must find out who they can trust and conquer their abilities if they are to survive a war they are as of yet oblivious of. Catarina and Sam are uprooted from their quiet lives in a tiny village in Sildar to embark on a magical quest. With the discovery of a magical amulet they must wear, they find they can travel to mystical lands in worlds they have never heard of. At the same time in another part of the world, Zak and Anna are reunited after being separated at birth. Schooled in the dark arts and advance weaponry by their aunt, they become fiercely strong and determined. In the end, all must choose a side; Light or Dark?