The Phantom of Paris - The Phantom Romance Series, #2

Christine Daaé has come to the realization that happily ever after isn't all she thought it would be. After the unwelcome she receives from her fiance's family, she leaves Paris behind and forges her own path to stardom, getting lost and finding herself along the way with only a stolen journal as her companion to help her understand the teacher who betrayed her trust. Erik Jeunet grew up believing himself to be a monster, and the girl who taught him that even monsters deserve a chance to be loved, was nearly destroyed at his hands.
Unable to imagine her acceptance of his ugliness, he does the unthinkable and must now live with the consequences of losing her forever. As war ravages Paris, he tries to protect the ones who stood by him, not knowing that by letting Christine go he sent her into dangers untold. This is a story of finding your own strength, discovering redemption, and ultimately, learning to love. This book is part of a duet.
Book 2, The Phantom of New Orleans, is already available for purchase.