Cast a Wide Circle by Lesley Davis

YOU HAVE EMAIL. 'Where am I?' For Taryn Parker, receiving email isn't just a friend checking in. When Taryn has mail, a lost soul is crying out for help. Then Kerrigan Archer, a beautiful witch, comes to Taryn. Kerrigan needs to retrieve one of these other-worldly messages and she knows Taryn can do it. Unexpectedly, Taryn finds herself thrown into a world of magicks and spell casting. Side by side, Taryn and Kerrigan face down the evil forces that reside on both sides of existence. Can love prove to be the strongest magick? Can Kerrigan cast a wide enough circle to keep them safe from harm? There's only one way to know.