Promises will be broken. Love will be tested.

Cassy Evans knows a thing or two about secrets. By juggling work and a hidden relationship with the world's biggest rock star for months, she's become an expert.

However, being with Frank comes at a price. Seven years after the accident that almost ended everything, his trauma still haunts him. Determined to get back on stage, the man known to the world as Frankie Blade would do anything to ensure the success of his band's reunion. But when one rash decision puts his entire career on the line, it's not clear if he can recover from it.

As Frank spirals out of control, pushing Cassy away, she has to face the reality of what they've become. He's harder to love than she imagined. Her common sense tells her severing all ties with him is the right choice.

Problem is, she can't leave without her heart. And Frank doesn't want to give it back.

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One Last Verse is the conclusion of Frankie and Cassy's story. It should be read after Final Serenade.