I think the WICKED book is fantastic, not a Pulitzer-worthy novel or anything like that, but it's a nice read, heavily political, darker in ways that would make the musical's "darkest" moments seem like a Disney ride, and with an Elphaba that is truly a complex, exciting, fascinating character, IMO. I would recommend the novel indeed.
I'm currently reading KAFKA ON THE SHORE by Haruki Murakami and cannot get enough of it. What a great novel. There's even talking cats. Love it.
If you like detective novels, there's this great series by Michael Nava about a gay lawyer called Henry Rios. Those are fun, and a pretty nice summer reading. I only read the last one, called RAGS AND BONE and really liked it.
"Some people can thrive and bloom living life in a living room, that's perfect for some people of one hundred and five. But I at least gotta try, when I think of all the sights that I gotta see, all the places I gotta play, all the things that I gotta be at"