Darkbeam Part II by Adrienne Woods

Please note that this is not for YA Audience like the Dragonian Series

Everyone knows the Rubicon is predestined for evil, and the alpha dragon does nothing to change their opinions of him. What they don't know is that he harbors a secret, a secret that can set him free, but also trap him forever.
Refusing to give in to that which can lead him to a path of freedom, Blake Leaf allows the darkness to attempt to claim his soul. But there is always a shining light somewhere, and sometimes it's just too dark to see it.
Will Blake find his way back to light, or is it too late for him?

Darkbeam Part II is about the events of Thunderlight and Frostbite (Book 2 and 3 in The Dragonian Series) told from Blake Leaf's point of view