I highly recommend Every Other Day. 
 ***** 
 NON-STOP ACTION. 
 Every Other Day should be the basis of any urban fantasy read; it was CRAAAZY good! The dual characters in one body made Kali one heck of a kick-ass heroine. The fun never stops, and when I say fun, I meant Kali's hunt of creatures that go bump in the night. This is undoubtedly one of the best UF book I've read so far. 
 Kali doesn't know why every other day she turns into a demon hunter; all she knows is that her hunt lust must be sated. Monsters can smell her as she them, that's why she's vulnerable when she turns human after 24 hours - she'll be defenseless by then. I love Kali mainly because of her 'hero complex'. Not only did I found it noble, but she's smart enough to have a plan once her 'hero complex' kicks in. Man, I wanted to be like her... I want to be HER! Kali is such a bad-ass. Zev inside Kali's head made me think of Wanderer from The Host. I was unaware of Zev's big role in the story but it played out well. Skylar is my next favorite character: upbeat, confident, brave. She almost drove me to tears, what with her 'feelings', her fondness of her brothers and how she still choose what fate has for her. Bethany is such a fun character; her constant angst-ridden retorts to Kali and Skylar made my reading very entertaining. But beneath her shallowness lies a pretty decent girl - nice! I don't like Elliot; he's such a wuss but a great brother to Skye nonetheless. 
 Every Other Day is a fast-paced, action-packed book. Brace yourselves as you join Kali in battling hellhounds, ice dragons, basilisks, and will o' the wisps (to name a few) with such confidence and lethal skill. This is not your usual paranormal/urban fantasy read so I hope you enjoy it as much as I did!