A life-altering moment of decision has arrived for psychologist Sarah Hagan. Which life will she choose: the mortal life she is now living in Chicago with her friends and family; or the Immortal life as the mate of a vampire who is part alien and part human? She can no longer ignore the Immortal Aris, who has tracked her through the centuries so they can be reunited as lovers for the rest of time. Will Sarah be able to pay the ultimate price required to fully experience true love? Aris is not the only one in love with Sarah, however. DeMarco, the King of the Spanish coven of vampires that has sworn to destroy the Immortals, is Aris' rival for Sarah's heart. If Sarah chooses to become a vampire, she also has to find the strength to fight in a vampire war that could destroy literally everyone and everything she holds dear. Can she triumph over her fears and become Immortal in time to join in a fight to the death? Read Aris Reigns to find out whether true love can vanquish evil. This is the third novel of the INFINITY DIARIES Series.