Mind Over Matter (The Flash - Book 4)

Four years ago, Zoe Sparks was affected by the dark matter wave released by the particle accelerator explosion and became the Phoenix. Fighting to protect the city from metahuman threats, she has faced and overcome several trials in her life.

Losing her parents in a house fire, being manipulated by Eobard Thawne/Reverse-Flash into hurting the people she loves, facing off against Zoom and Hellfire - an evil speedster and flare from another earth - and dealing with the aftermath of Flashpoint.

After defeating Savitar, an evil time remnant of Barry who tried to kill her, Zoe's life changed forever when the unstable nature of the Speed Force threatened to destroy the city and Barry chose to sacrifice himself to save everyone.

Now, she is the sole leader of Team Phlash, and with the help of Wally West/Kid Flash, Cisco Ramon/Vibe, Iris West, Detective Joe West, and her adoptive father, Zach Abrams, she continues to keep Central City safe and encounters a new foe who threatens to level the city unless the Flash returns.

But breaking Barry out of the Speed Force causes a chain reaction, resulting in the creation of 'bus metas' who become essential in a diabolical plot orchestrated by the Thinker.