Kalona's fall a House of Night novella

"The excitement continues as the Cast mother-daughter duo shares the back stories of a few of the House of Night's most important-and mysterious-characters. In Kalona's Fall, the shadows in Kalona's past will finally come to light ... We will learn about the winged immortal's secret history and discover how he went from being the Goddess's Warrior and Guardian to her enemy and betrayer. Did Darkness taint Kalona as it did Neferet, or has the powerful immortal always preferred power over honor, and control over faith?"@en
"With more than 12 million books in print, rights sold in almost forty countries, and more than three years on The New York Times bestseller list--reaching as high as #1--the House of Night series is an international publishing sensation. Now, the excitement continues as the Cast mother-daughter duo shares the back stories of a few of the House of Night's most important--and mysterious--characters. In KALONA'S FALL, the shadows in Kalona's past will finally come to light. ..."@en
"From the Sun and from the Moon, two winged brothers are born: golden Erebus, playmate and friend, and mysterious Kalona, Warrior and lover, companions of the Goddess Nyx. From warrior and lover to enemy and betrayer, the terrible secrets of Kalona's past are revealed."@en