I received Cottage by the Sea as a free book on kindle and was pretty impressed! The present day story was very believable, but almost too believable to enjoy the included "flashbacks" or the dual time of the book.
As a whole, some good relational content (between Blythe and her ex husband, and then Blythe and Lucas, and the strained relationship between Lucas and his son) and enjoyable "mystery".
Worth a go. But not worth your only three hours of free time in a hectic day. More like a "what do I do with all this free time" on a long plane ride or relaxing vacation.