There are 50 suggested topics and that can be pretty scary but as they have said over at PopSugar, the point is to read and broaden our horizons. 50 books includes the advanced section so if that is not doable go for the basic list of 40.
What comes after the reading? Here is what they suggest at PopSugar.
"So you've decided to take the reading challenge — what now? We'd suggest joining this Goodreads group, which is made up of more than 8,000 readers who participate in the POPSUGAR Reading Challenge every year. In addition to keeping you accountable, the group's impressively well-read and supportive members swap book ideas for the prompts and discuss their favorite (and least favorite) reads throughout the year. You'll also be able to track which books you've read and rate them on the site."