Original Sin continues the sinfully good story of a girl lovestruck over a demon and an angel. Luc the demon is now under his nemesis Gabe’s protective shield along with Frannie. Gabe can’t take the heat of this love triangle with Frannie and has reassigned his duties to heaven’s newest guardian, in a surprising choice. With demons now stalking Frannie and Luc at every corner, is the new guardian angel up to the task? The lines between good and evil blur as all your favorite characters from Personal Demons are put to the test by some menacing new demons.In this sequel to Personal Demons, darker days have arrived. There is a sinister element clouded over Frannie and those close to her. As such, the action ramps up as the battle over good and evil rages on. The demons are swirling around Luc and Frannie providing temptation and looking for answers. How is Luc shedding his demonic persona? This installment has a darker edge and the suspenseful thrills even caused me to put the book down for small breaks between chapters. The romance, surprises, and mysteries kept me entertained throughout the book. Questions are answered as new discoveries, villains and mysteries are introduced to keep my interest going in the series.Luc, Gabe, and Frannie are back again front and center in Original Sin. Luc is trying to live in his new skin and be worthy of Frannie’s love while battling his internal demons. Gabe is absent through much of the book, and without his influence the book takes a dark turn. Frannie does not handle the turmoil in her life well and her strength is weakening as she becomes very emotional in this book. Frannie’s dramatic tendencies can drag down the book at times, and her character could use a thicker skin. Luc and Frannie continue to share their POV in alternating chapters, along with a new character’s voice. The new characters are a little shady and mysterious. Frannie’s new guardian angel is a new character voice that gets to share their POV. And rounding out the cast are Lili, a new shy neighbor of Luc’s, and Rhenorian, a demon assigned to return Luc to hell.I liked learning more about Frannie’s Sway, and am eager to see how she grows into this power. The mythology and hints about the origin of the characters is also of interest. The big picture is starting to take shape as we get more pieces of the puzzle. There are demons galore causing havoc and mayhem as their interest and intentions toward Frannie start to materialize. Ultimately, love and lust take center stage in Original Sin.Fans of Personal Demons should enjoy this entertaining sequel. This time around the action is taken to the next level, with more steaminess, drama and mystery. A fun summer read and I look forward to seeing what happens next with this trio.