If you're looking for a ticket into the far future or a faraway kingdom, science fiction and fantasy novels offer some of the best round-trip destinations. This year, our readers have found retreats in the Nikara Empire and along the edges of the Unknown Regions . But which of these travel spots can be considered 2018's best of the best (so far)? We've got the answer.For this roundup, we focused on the most popular science fiction and fantasy books published from January to August. To measure this, we took a look at how many times a book has been added to Goodreads members' shelves . From there, we narrowed down our list to include only titles that have a minimum four-star rating.How many of these books have you read? Don't forget to add your favorites to your Want to Read shelf