Hooray, it's World Book Day! To honor the special occasion, we recruited POPSUGAR editors to help compile the ultimate list of geeky reads. Ahead, we're highlighting the best must-read epic fantasy series, with all the elements of the genre: a large cast of characters, a magical alternative world, and complex, integrated plotlines. And if science fiction is more your thing, bookmark our guide to the greatest sci-fi reads too.
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