NPR is asking its readers/listeners to vote on the best science fiction and fantasy books of all time for their new summer poll. Your vote will go toward shaping the top-100 list and it will also give you a chance to peruse other recommendations for your summer SF/F beach/yacht/pool/park bench/planking/treadmill/spelunking (or where ever else you do your summer reading) reading list.

Here are the rules:

1. Limit yourself to five titles per post. Don’t hesitate to nominate a book that someone else has already listed; your entry will count as a vote in favor of that title progressing to the next round.

2. No young-adult or children’s titles, please. We plan to devote a poll to YA next summer. (It’s also no fun if Harry Potter wins every year.)

3. Horror and paranormal romance are also out, which disqualifies most of Stephen King (also a big winner in previous polls), Charlaine Harris and Stephenie Meyer. Once again, we’ll cover horror in a future poll.

4. Feel free to nominate a series — such as Tolkien’s Lord of the Rings or Asimov’s Foundation — as a single, collective work rather than listing individual books.

5. That said, there are series and series: To qualify as a collective work, the books in a series must be written consistently by the same originating author or authors. For example, you can’t nominate the whole Star Wars franchise, though you can nominate individual Star Wars novels.

Vote here.