A guarded heart is a lonely heart . . . Piper Davies is a leading researcher in the fields of viruses and nanotechnology. All she ever wanted was to help save lives. But her newest creation has the potential to be manipulated to kill a single person, as well as launch a global pandemic if it ever landed in the wrong hands. And unfortunately, someone knows what she's created and will stop at nothing to get it. Piper's family hires someone to protect...