The Faerie Path #4: the Immortal Realm 1 Reprint edition

In an instant, a time of joy and celebration turns to one of heartbreak and fear.

Tania has finally found a way to bring her Mortal and Faerie Worlds together, and at last, all seems right for the princess. But her idyllic peace is shattered when a Faerie baby falls ill, followed by more and more Faeries. Something is terribly wrong.

Tania quickly joins forces with her sisters to find a cure for this dark plague, yet she soon realizes they need help from the Mortal World. Now with countless lives hanging in the balance, Tania makes a desperate move that will either save the land and people she has come to hold dear . . . or destroy their only chance for survival.