I'm going to suggest the two books that I read last year, at the advice of my girlfriend, that got me back into reading novels, surprisingly neither of which I have seen mentioned ITT yet.
A story of a group of eccentric students at university studying Greek. To tell you much more of the story would ruin some of the best parts, however it slowly unravels much like a Greek tragedy itself. It is well paced and suspenseful, dark yet with some humour beneath it. If you've opened this thread, I guarantee that you will love this book.
Earlier in the thread I saw a recommendation for Tartt's next novel, titled The Little Friend, which I found much more of a chore to try to read and nowhere near as enthralling.
This book is simply a joy to read and I am sure will be remembered as a classic in the future. Great characters, a dash of mystery, romance and complex plotting that's easy to follow. It completely immerses you in the richly beautiful world of 1940's Barcelona.
This book makes me wish I could read Spanish, so I could read the pre-translation version. That is not to say that there is anything wrong with the translation, in fact it is a product of the translation being more beautiful and poetic than any other I have ever read.