The Ancestor's Design. The Solomon Arcanum, #4

Six months after the fall of the Order's Grand Magister, a fragile peace has settled over the hidden magical world. It doesn't last. When a series of ritualistic murders begins tearing through both Order ranks and the newly formed Covenant, Kyra Vale is forced back into the role she never wanted-investigator, leader, and living keystone holding a broken system together. Each crime bears the signature of magic shattered from the inside, echoing doctrines older than the Order itself.
Cade Rowan is unraveling. His Inborn power, once suppressed by sigils, is no longer obeying restraint. Every attempt to contain it brings him closer to becoming a danger to the people he's trying to protect-and to losing Kyra entirely. Meanwhile, Leo Hart feels something stirring beneath his control. The Lacuna that once marked him as Marred is no longer silent. It whispers of balance. Of purity. Of a world mended not by repair, but by erasure.
Their enemy reveals itself slowly: a hidden cabal of ancient Inborns known as the Precursors-survivors of the Order's original purge who believe both sigilcraft and Kintsugi are corruptions of true power. To them, the Solomon Key is not salvation, but the final flaw that must be destroyed. As alliances fracture and old enemies resurface, Kyra is forced into a dangerous pact with the Order she helped break.
Cade must decide whether control is worth the cost of obedience. And Leo must choose between loyalty and the seductive promise of a power that claims to be whole. Because the Ancestors were never just history. They were a design. The Ancestor's Design is Book Four of The Solomon Arcanum, a dark urban fantasy series blending cinematic action, morally complex characters, and a hidden magical world where power is shaped by will-and the truth is far more dangerous than the lie that concealed it.