The Missing Piece by Catherine Miller

Broken Heart Syndrome: A sudden and acute form of heart failure, brought on by emotional or physical distress
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After years of studying cardiac medicine, thirty-one-year-old Keisha knows the heart inside out. She knows the average heartrate for each age group, she can name every valve, and she can tell you exactly how much blood it pumps daily.

The one thing she doesn’t know is how to fall in love. And nor does she want to. The secret her tattoo covers is a reminder that the best way to protect a heart is to never let it feel in the first place…

Seventy-nine-year-old Clive is Subject Five in Keisha’s latest research project. He’s been in love since he was seventeen, ever since he met Nancy at a tea dance. But last night, his beloved wife was killed. Suddenly, he has no one to waltz with. He has woken up in hospital, a widower diagnosed with Broken Heart Syndrome.

These strangers, brought together by a broken heart, must face up to the truth of their pasts. Can Clive teach his new friend that until you’ve loved, you haven’t lived? And can Keisha help him see that it’s never too late for a second chance?