Undead and Unfinished - MaryJanice Davidson

Vampire Queen Betsy Taylor is fed up of trying to decipher the strange things prophesied in The Book of the Dead. At the end of her tether, she strikes a deal with Satan who promises to help - if she and her half-sister Laura pay a visit to Hell. Hell, it would seem, is more terrifying than Betsy could have ever imagined - a waiting room with bad carpeting, re-runs of 70s TV shows and ancient Good Housekeeping magazines. But when Betsy and Laura find themselves catapulted back and forth through time, they realise they could seriously screw everything up for good...