Why does a book from 2016 have 150 holds on it? Why is the bestseller list suddenly inundated with seemingly random titles? Some of the most talked about titles from the past few years all lead back to one place: #BookTok. This hashtag has become the hub for book tastemakers and enthusiasts on the app TikTok. The level of influence this community wields cannot be understated. A title that goes viral on #BookTok can suddenly be a #1 New York Times bestseller, seemingly overnight. Keeping up with trends on #BookTok might seem overwhelming, but we've got you covered. Check out these two booklists for some of the hottest Adult and Young Adult titles, and see what the buzz is all about.