I'm revisiting challenges of the past two years where I fell short and adding to them the Great War because it's the centenary of the Armistice. This year, I'm not going to have targets for my categories, just see how it goes. I may revisit at mid-year and add something different. My overall goal is for 120 books, but that's more of a benchmark than a goal.
ETA:
Fail. Edited to reflect the topics I'm actually pursuing.
I'm linking to my Goodreads lists because I'm lazy.
2018 read
Great War centenary
Between the Wars
Religion
Trollope
Victoriana