Tome Infinity And Beyond Readathon discussion

I have some ideas that I am playing with for Round 3 but would love to hear from all of you!

What works and what doesn't?

Ideas?

Some kind of war of the worlds?? We could have to read the books from someone else's previous TBR. Or there is some kind of boss that has x amount of xp and we have to read that many pages to defeat them.