Objectively, this is not a stellar book. It's fine and everything works for the most part, but there's nothing here that should blow me away or that's special. Yet, for some reason, I love rereading the second half of this book from time to time. I don't know. I can't explain it.
Ellie is a spinster poor relation who has spent her whole life tending to her younger cousins because of her gambling father. Damien is an illegitimate gambling club owner who has a childhood connection to Ellie's cousin, Walter, who stole something that relates to Damien's murky past. To get it back, Damien decides to kidnap Beatrice, Walter's cousin, but ends up with Ellie. They don't know that until they're up in an isolated Scottish island.
There are a lot of readers, particularly these days, that would be turned off by the kidnapping trope. It's not really a deal breaker for me--it usually depends on the context and the way it's written. It's not great, but it's not as bad as others I've read.
The romance is actually pretty good -- I buy the slow build and the reasons these two come together, their bumps in the road. I like both the characters, but I think the overall plot is pretty weak and the supporting characters are cardboard and one-dimensional.
I think it's a good book that's worth reading once, maybe twice. With a tighter plot and better supporting cast, it would have been much better.