Dark Flame is the fourth book in the Immortals series. It was published in June 2010.
Ever Bloom struggles to help her best friend Haven transition into life as an immortal—trying to keep her from doing anything that puts them at risk, while attempting to gain control over her enemy Roman, so she can finally obtain the antidote that will allow her and Damen to be together. But when the spell she casts backfires, resulting in a strange, foreign pulse that binds her to Roman instead, Ever becomes so bind to Roman that she finds herself in love with him, and almost losing her very virginity to Roman. Ever turns to Jude and dark magic, desperately attempting to break free of the curse, and ultimately risking everything she knows and loves—including her beloved Damen.