The Missing Sister by Elle Marr

An Amazon Charts bestseller.

In Paris, her twin sister has vanished, leaving behind three chilling words: Trust no one.

Shayna Darby is finally coming to terms with her parents’ deaths when she’s delivered another blow. The body of her estranged twin sister, Angela—the possible victim of a serial killer—has been pulled from the Seine. Putting what’s left of her life on hold, Shayna heads to Paris. But while cleaning out Angela’s apartment, Shayna makes a startling discovery: a coded message meant for her alone…