The Summer Tree by Guy Gavriel Kay (The Fionavar Tapestry, Book One)
Synopsis: Five Toronto college students are pulled into an alternate world where they discover their true destinies at the outset of a war that could affect all worlds, including their own. Review: Yep, another hard-to-synopsize epic fantasy book. The Summer Tree by Guy Gavriel Kay employs one of the standard fantasy templates–ordinary people drawn into an extraordinary world–making the book “execution dependent.” That means that Kay has to work twice as hard to make the story feel fresh and exciting.