Catalyst

All Kay wanted was to escape the shadow of his father, Lawrence Walker, the former council member responsible for dooming Ada’s homeworld to destruction. Now Walker is back, his plans more ruthless than ever, and the world he left behind might be the final catalyst for a cross-world war.

Kay and Ada race against the clock to stop Walker and save a world from the deadly trap that cost Kay’s mother her life. With the Alliance turning on itself and Ada’s homeworld threatening war, Kay and Ada must overcome their most dangerous adversary yet before it tears the Multiverse apart.

This blend of contemporary fantasy, murder mystery, and an action-packed world-hopping adventure will appeal to fans of the alternate Londons of Ben Aaranovitch and VE Schwab, the modern magic of the Dresden Files, and the genre-blending of Genevieve Cogman’s Invisible Library series and Diana Wynne Jones’s adult novels.