When secrets arise, friendships will be tested. As the Great Library of Tomorrow prepares for a momentous celebration, Nu embraces both newfound love and her role as the Sage of Truth. However, if fresh nightmares prove to be the harbingers of Suttaru’s malevolent forces, romance must take a back seat to her responsibilities. When a savage act sends shockwaves through the Great Library, the return of an old friend brings to light a hidden relic from the Book of Wisdom’s past. To stop the enemy, the Sages must pursue multiple paths. For Nu and Robin, this means travelling the realms in search of a mysterious figure from long ago. Meanwhile Veer and his companions brave a realm of darkness and despair, where even the strongest can become undone... From the ingenious creators of Tomorrowland comes The Sky of Sacrifice, the highly anticipated follow-up to The Great Library of Tomorrow, the epic first volume in the Book of Wisdom trilogy.