Six is the mirror image of R.E. Carr's debut novel Four. Not a sequel so much as an expansion of the world she created. Six is a new story with interesting new characters, but it also offers a different perspective of some of the characters first introduced in Four. This is an interesting take on series writing, potentially risky for any readers looking for a straight continuation, but refreshing in showing us that perception can vary greatly depending on the eye of the beholder.
Six is the story of Paige, a frustrated and under-appreciated twenty-something year old, striving to earn a living while those in her life mostly step all over her. Things change quickly for her, though, when she has a not-so-random encounter with a werewolf. What follows is a quirky tale of her learning to master her fledgling powers as well as coming to terms that the supernatural is real ... and full of creatures that seem to want to alternately hurt, kill, or mate with her (and sometimes all three).
Where Six shines is in its large ensemble cast, an eclectic group of vampires, werewolves, and mortals, all of whom are given a chance to shine as the story plays out. Some of the best scenes are the simple interactions they have with each other as they get to know one another. That said, fans of both romance and action won't be disappointed as the book contains plenty of both.
If Six can be said to have a weakness, its in the second half where some of the group dynamics are downplayed in favor of action reminiscent of an extended chase scene. However, this is a minor quibble at best, and the story comes together nicely at the end.
All in all I found this book to be a worthy successor to Four, with stronger characters and a more robust story to tell. I very much enjoyed it.