Science-fiction is no longer a niche genre. Sure, there are those who never touch the stuff, but sci-fi and fantasy are forever creeping closer to the mainstream, whether in full-fledged novels or by sneaking into contemporary literary fiction. That said, sci-fi has always been wildly popular among those who love it — the genre has a stable of incredibly loyal fans who have shot their favorite books up the best-seller list for years. To that point, Book Patrol has created this inforgaphic the best-selling science fiction books of all time, and though their standards for what constituted sci-fi are a little wide (The Lord of the Rings?), we still think it’s pretty interesting — and we’re adding to our reading lists as we speak.