Terry Pratchett - all of the Discworld books, particularly the Night watch ones and the witches.
Neil Gaiman - Neverwhere and American Gods are my favourites.
Terry Pratchett and Neil Gaiman - Good Omens: The Nice And Accurate Prophecies of Agnes Nutter, Witch. Might actually be my very favourite book, it always makes me happy to read it and I have read it a million times. I have lent out several copies (and worn out a couple more) and everyone that has borrowed it from me and read it has enjoyed it. (New series coming up on Amazon Prime Video very soon with David Tennent (Crowley) and Michael Sheen (Aziraphale) as the 2 main characters, can't wait!)
Haruki Murakami - Kafka on the Shore.
For proper read it in one go silly fun I have recently really liked John Dies at the End by David Wong. I also really enjoyed Eleanor Oliphant, which is not my usual kind of book at all.
Iain Banks - pretty much all of his books, especially The Wasp Factory. Iain M. Banks (his sci-fi stuff) are also great.
I have been re-reading a lot of my old sci-fi stuff recently too. Hyperion by Dan Simmons, I am Legend by Richard Matheson, Do Androids Dream of Electric Sheep by Philip K Dick (The book Blade Runner was based on) also Flow My Tears The Policemen Said, The Day of The Triffids by John Wyndham, Slaughterhouse-five and Player Piano by Kurt Vonnegut.
I'll stop now 