Polite Paradise

I just looked that up and apparently Hannah was interviewed and said she had decided not to try to recreate Christie's style. Instead she created an OMC who is apparently the world's most inept police detective. Plus, for a book set in 1929, she's got a poor grasp of the era.

Personally, I'm leery of trying to continue a series after the author is dead- or coauthor in the case of Dick Francis' mysteries. His wife Mary was his coauthor, though this didn't become known till after she died, I believe. His books with Mary were great, the later ones with his son were a grave disappointment. Mary's perspective made the books more three-dimensional characters. I made several attempts to read the later books and have yet to finish one. I always get bored halfway through.