Really, I was between a 3 and a 4, but I decided to go with a 4 because I felt like Jacobs' take on shifters was a bit unique to what I've been reading lately.
First off, there's a division in the world of shifters between the born and created shifters which has created violence and fear between the two groups and each of their allies. On top of that, there's something special about Wren, our MC. While she can take on animal form, there are also these elemental aspects to her power that make her into something new, something that I haven't yet encountered in my urban fantasy obsession.
Unleashed is one of those books where you learn along with what the narrator knows. So, to start off with, we have zero knowledge, really, about the paranormal world. Since Wren's POV is our lead, we're limited to what she's been exposed to throughout her life which is really quite sheltered. As a member of a conservative religious group [cult], her knowledge has been restricted, and she's very much been led down a very specific view of the world.
Despite being raised under the guise of illness, Wren has a strong spirit. She's got some passion and fire to her, particularly when it comes to her moral compass. I like that she speaks her mind and makes her values/position clear even when the others disagree with her. She's standing her ground, which is admirable considering she's kind of just thrown (well, kidnapped) into this entire shifter world.
Jacobs' shifters seem to have two things going for them- their animal forms and the bonuses that come along with that (speed, strength, etc), but there also is a mystical component. Although we don't quite figure out yet what each of the four men's gifts are, we learn a little bit of what they can do.
Wren's potential mates: Kite, Dust, Creedence, and Luke, are a study in surface contrasts. We're getting the full range of personalities from stuffy to flirty, soulful, and dangerous. The balance is nice, giving us variety in their dynamic instead of her falling into relationships with four of the same men.
So far, I think Creedence may be my favorite. Although he's flirty and funny, the glimpses into his perspective point to deeper waters running beneath the surface. He seems like a man that doesn't think too much of himself, and I really want to learn more about why. Dust, Wren's childhood friend, seems kind of trapped by his responsibility and the mantle of his alter form. Beneath the stuffiness lurks bits of humor, and it's clear that he cares about Wren, at least the girl that he used to know. Kite, our soulful bear, is kind and seems to have a good innate understanding of what drives Wren, his values appearing to be closest to hers as we enter into this mayhem. Last but not least, Luke. I'm reserving judgment on him for now; he definitely intrigues me, and I think that he's going to be more valuable and faithful than the other men suspect, but I guess time will tell.
I like that time is being taken to develop the relationships. Although there's definitely some instant lust and ogling between Wren and her men, she's not jumping straight into bed with all of them. She's not very experienced, but her lust for life, and the men, makes it clear that things will likely get steamier in book two. Already in book one we get to see some progress the more comfortable she is with the men, so fans of the romance will definitely get some satisfaction.
Overall, a solid opener to a new series.