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First Rider's Call (original 2003; edition 2004)
Amazon.com Product Description (ISBN 0756401933, Mass Market Paperback)
In this long-awaited sequel to Green Rider, Karigan G'ladheon finds herself in a world of deadly danger and complex magic. Compelled by forces she cannot understand, she becomes one of the legendary Green Riders-magic messengers to the king. Pursued by the ghost of the First Rider, Karigan will re-enter the life of the Green Riders-just as an ancient evil is reawakening...
(retrieved from Amazon Mon, 30 Sep 2013 13:41:25 -0400)
Karigan G'Ladheon was a green Rider, one of the King of Sacoridia's magical messengers. With evil forces at large in the kingdom and the messenger service depleted and weakened, can Karigan reach through the veils of time to get help from the First Rider, a woman who has been dead for a thousand years?
(summary from another edition)
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