Sue keeps her Big Book Summer Challenge pretty chill. Just read one or more books of 400 or more pages and you're in! I love historical fiction that runs to well over 400 pages, so likely that is where I'll be delving, but who knows! It runs Memorial Day (today) to Labor Day (Sept 5). This is the 10th anniversary of the challenge, and there is a GoodReads group where you can post about your progress and check out what others are reading for the challenge.
See you in the Big Books section of the bookstore or library :)