Every Other Day by Jennifer Lynn Barnes
"Every other day, Kali D'Angelo is a normal sixteen-year-old girl. She goes to public high school. She attends pep rallies. She's human.
And then every day in between...She's something else entirely.
Though she still looks like herself, every twenty-four hours predatory instincts take over and Kali becomes a feared demon-hunter with the undeniable urge to hunt, trap, and kill zombies, hellhounds, and other supernatural creatures. Kali has no idea why she is the way she is, but she gives in to instinct anyway. Even though the government considers it environmental terrorism.
When Kali notices a mark on the lower back of a popular girl at school, she knows instantly that the girl is marked for death by one of these creatures. Kali has twenty-four hours to save her and, unfortunately, she'll have to do it as a human. With the help of a few new friends, Kali takes a risk that her human body might not survive...and learns the secrets of her mysterious condition in the process."- summary from Jennifer's website (the only website to have the full summary; everywhere else stops at "few new friends" for some reason)
I love Barnes' Raised by Wolves books (and am eagerly waiting for the third book) and so was excited to read something different from her (I do know she has books out from before RBW, but I don't have time to really read books from several years ago, which is a bit of a shame.). This was an amazing book that I could not put down. It's full of suspense and non-stop action with tons of amazing reveals.
Kali is a great main character full of spunk, sarcasm, and smarts. I also loved pretty much every other character involved in Kali's quest that it's hard to pick favorites. Even pretty minor characters like some of Skylar's brothers were fun to read about. Both Skylar and Bethany were fantastic secondary characters and it was great having them along on the journey. Barnes does a wonderful job with all of her characters, really making them jump out and be real and flawed. I loved it.
I liked the variety of creatures Barnes featured in the book as they're ones not usually found in paranormal and urban fantasy (at least, the ones I've read). I will warn people that this book is fairly gruesome and violent. Action scenes involving killing are pretty well detailed so this may not be for the squeamish.
Overall, an absolutely amazing book, though I'm a bit peeved at something that I felt could have been avoided but it's a spoiler so if you've read the book and want to know what it is, you can talk to me about it. But it is an awesome book otherwise, lol. I also had no idea it was going to be a series but it ends well and I cannot wait for the next book!
FTC: Borrowed ARC from Susan of Wastepaper Prose (after the e-galley I had was archived over a month before release date for no reason and with no warning, so thanks Egmont.). Link above is an Amazon Associate link; any profit goes toward funding contests.