Read Your Own Books Challenge. It's pretty self-explanatory--the point is to read as many of the books you currently own as possible.
Many of the books I'll be using for this challenge probably won't count as books for the monthly themes, but they'll be good filler books for when I'm taking a short break from the themed books. I'm going to set an arbitrary number of books as a goal but it may reach higher than that by the time the end of the year rolls around.
Challenge Goal: 35 books between now and December 31st.
That averages out to about three to four books a month, which I think is doable.