The challenge runs from June 21st, the official first day of Summer, to the 22nd of September (the day before the Autumnal Equinox).

Here are the challenge levels:

Any book of at least 100 pages that is classified as Science Fiction, including any Sci-Fi subgenres, qualifies for this challenge.  That means audiobooks, physical books, ebooks, library books, free books, other borrowed books, anthologies, and graphic novels are all acceptable options.  You may also count any Sci-Fi book that counts towards another reading challenge.  On June 21st, I'll post the link up for your reviews, and it will stay open until September 29th.