SOLVED. British Fiction Story with Twist Ending. [s]

[Amy]

I read this book within the last two years. A man has found that his wife died by drowning and a stranger to town helps him recover from his grief. Story is set in a British town. The ending of the book is a complete surprise and the husband is completely unsatisfied with the turn of events.

[Kris]

A guess - Interference by Amélie Antoine?

Amy, what's the genre - mystery, psychological thriller, romantic suspense, etc.? What's the time period?

How and where did his wife drown? Is he suspicious about her death near the start of the book?

Can you tell us more about the characters - is the stranger a romantic interest, their jobs/skills/interests, their ages, any children, etc.?

[Amy]

You're a genius! This is the book I was looking for. Thanks a million!

[Kris]

Great! Glad you found your book. I got very lucky with a Google search:

site:www.goodreads.com "mystery" "his wife" drowned grief "twist"