Currently seven of the fifteen books on the New York Times bestseller list owe their audience to TikTok; four of these are by author Colleen Hoover, a hitherto little known TikTok phenomenon. Observers have celebrated that this surge of spontaneous book promoting gives voice to the average reader, resuscitates the “backlist” of previously published books, compensates to some extent for the disappearance of book criticism, and appears to foster new readers.
Source: TikTok Has Changed Everything, Especially Book Publishing