So, you like Tolkein and Dickens? - I've got just to book for you as it happens to be my favourite of all time -
The Lies of Locke Lamora by Scott Lynch. I recommended it on here last year and
@Paladin enjoyed it.
It's set in the fantasy city of Camorr, which is clearly based on Venice .... but it's a little different to some fantasy books. It's about a group of con men who pull off outlandish cons. The "Dickensian" bit comes in the form of the back story where we find out about how a young Locke Lamora comes to live with a group of petty thieves and how he quickly outgrows them.
The story unfold in two timelines - then and now - and there are several genuine WTF plot moments. The prose is, of course, exceptional: I've never read a book like it and doubt I ever will again.
Anyway, even if you don't start with it, stick it on your list.