The Sword of Sighs by Greg James
THE NUMBER ONE DARK FANTASY BESTSELLER!
Sarah Bean lives a quiet life in Okeechobee, Florida until the day when she is transported from our world to the fantastic realm of Seythe. She meets a wayfaring wizard called Ossen who saves her from the dreaded black riders, servants of a being known only as the Fallen One. Together, they will have to undertake a treacherous journey to the far-away Fellhorn mountain where Sarah must find the one weapon that can save them from the black riders pursuing them - The Sword of Sighs.
NB: This novel is recommended for mature young adults as it contains occasional bad language and occasional scenes of a graphic nature.