Havisham by Ronald Frame (Picador, 2013).
Ronald Frame has picked an interesting Dickens character for whom to write a prequel. There are major Dickens characters who have little to no backstory, but then there are major Dickens characters whose backstory is pretty thoroughly filled in for us, and Miss Havisham is one of these. Herbert sketches out her background for Pip shortly after the latter arrives in London. There are some aspects of it he admits to knowing nothing about (such as the details of Estella's adoption), but he gives us a pretty full picture of what he does know about.