God created angels and created them with free will, the story helps one to understand, at least in a fictionalized rudimentary level, the change in Lucifer's eye of how he changed into our arch rival the devil, is tried to be explained in this series of novels.
El Ciclo de Cyann Integral. Tomos 3 y 4
Daredevil: Tierra de Sombras
Ikigami 09 (Cómic)
¡trágate Ese Sapo! 21 Estrategias para Triunfar Combatiendo la Procrastinación