*Warning ~ mild spoilers may occur here*My poor little black heart was obliterated at the end of Lying Season. Pulverized, smashed, crushed, shattered into a million little sparkly bleeding dark pieces. Seriously. Okay, well...almost. It did hurt. And, in my typical fashion with Halle books, I had stayed up entirely too late reading it but still had to start On Demon Wings right away because I HAD to know what the hell was going on. So, alas it was another sleepless night for me. It's okay though, my delirium comes at the hands of a master.Anyway.At the beginning of On Demon Wings we find Perry trying to piece together a new life. A life with no Experiment in Terror and no Dex Foray. The horror!! A life with mind numbing coffee slinging and an over bearing family keeping an eagle eye on her, waiting for her to lose her mind. Or, lose it more than she already has. She's heartbroken, lost and haunted. Quite literally.There is something dark and demonic making its presence known to Perry, popping up wherever she is and at the most inopportune times. It's determined to take over her life, or kill her and the only person that believes what is happening to Perry is her little sister Ada. Ada has a pivotal role. She shows her true colors and they shine pretty bright.Maximus makes a return appearance in this chapter with the air of 'helping' Perry. Right into bed anyway (and boy was that scary hot). Maximus was gem I really wanted to crack but he lost a bit of his luster towards the end of this book. When it looks like the demon is winning by any cost, Dex comes back into Perry's life. But is it too late for these two to save each other? It might just be and it's going to take more trust than Perry has for Dex to be able to save her. “He was still a douchecanoe. The douchecanoe who was going to paddle me to safety.” Every book in the Experiment in Terror series gets better and better, as well as scarier and more addictive. There were some moments here that terrified me and I made sure that I never read it alone in the dark. On Demon Wings is beautifully sinister and harrowing account of an epic battle against demonic possession and loss of all sanity. An account I could not put down or read fast enough.I don't have the mental capacity or the pretty words to explain what it is Halle does so well, I wish I could do her justice. This is the most addictive, uniquely creative series with the perfect mix of lovably dysfunctional characters, terror, humor and obsessive relationships. I can not get enough.