Golden Knight by Nichole Ruschelle

I was eight when I saw her standing at the end of my driveway.
She looked like Rapunzel with that long blonde hair, and I couldn’t take my eyes off her.
And when she ordered me to be her best friend…
She became mine.
Forever.
Then the unthinkable happened.
I was sixteen when she disappeared.
Gone.
House empty.
Only her cell phone left behind with her final message to me.
Never sent.
I spent my life getting the training I need to find her. But every search, every mission, left me empty handed.
But my feelings, my determination, my hope…those never dimmed.
I will find her.
And anyone who’s ever hurt her…
Will pay.

This is the fourth book in The Twisted Grimm Series. It’s an interconnected standalone, Rapunzel retelling. You do not have to read the other books to read this one, but you will see the other characters in each book.