This is a case of ‘make a really poor TV adaptation of a book (Dublin Murders BBC 1)’ and drive a reader back to the original book.
This is a very long and quite difficult book, but very good and worth reading. It reminds me of a book by Donna Tart called, I think, A Secret History.
The plot is extremely complex, an infiltrator into a group of friends is murdered, and she (apparently still alive) is substituted back into that community by a lookalike police officer, Cassie the heroine of most of her books. She is drawn into the group, but eventually unravels the culprit, but in a far from straightforward way. I'm not summarising it very well, but an excellent book.
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