Romantasy may be the hottest genre in the publishing world right now, with its epic stakes and complex relationship dynamics, but, as an established genre, it hasn’t actually been around all that long. And in the summer reading sweepstakes, there’s something to be said for a reliable old favorite that’s still managing to delight and innovate in a breadth of thrilling (yes, that pun is on purpose) new ways. Many of us almost certainly associate thrillers with summertime.