I hope you do give the next book in The Dark Tower series a try! I thought it picked up big time after the first book and that's one of my favorite book series.
I'm reading "We Need New Names" by NoViolet Bulawayo right now. I just finished Selasi's "Ghana Must Go," which I loved. So far I am not a big fan of "We Need New Names," but there's still plenty of time for that opinion to change.