Besieged Adept - Wild Sorceress Series, #2

In a world where hostile nations wield magic in combat, twin sorceresses separated at birth and brought up on opposing sides of the war find each other. Together, they face persecution for using wild magic, fight against traitors and assassins, explore family secrets, and discover the hidden origins of magic itself. Above all, to protect their world, they must deal with ancient, powerful dragons that most people don't even believe exist.
While learning to control her wild sorcery, Adept Aetria has defeated a pair of traitors trying to kill her, found a long-lost twin, and uncovered secrets of the source and nature of magic. Now she continues her research while battling the remnants of the Neo-Aggressor rebellion and integrating raw, untrained talent into the Sorcerer Corps. Meanwhile, she discovers deeper secrets of her own family background, along with a surprising new foe and a destiny she never dreamed of.
Furthermore, she learns that her "imaginary" dragon friend Rajii actually exists...but so do less friendly dragons. What does their agenda mean for the future of humanity and magic in Aetria's world?