Marguerite Caine’s parents are both genius physicist and have invented a device that allows the user to jump between alternate dimensions, by basically inhabiting the body of the alternate version of themselves. Before the device could be properly tested, however, Marguerite’s father is killed in a car accident and her parents’ research assistant, Paul Markov, has disappeared into another dimension with the only finished Firebird device.
Her parents’ other assistant, Theo Beck, has luckily kept two of the early prototypes of the device and fixed them up enough that he and Marguerite are able to follow Paul through the dimensions. Marguerite wants revenge for what Paul did, and initially, at least, she wants to kill Markov for his betrayal of her family. As she and Theo follow Paul through successive dimensions, some very similar to their own, some vastly different, she comes to realise that there may be a reason that Paul is on the run, and it’s not because he’s her father’s murderer.
Full review on my blog.