Rainbow Rowell made a name for herself penning last year’s funny and heartfelt young-adult fiction novels Fangirl and Eleanor & Park, the latter of which is headed to the big screen and has already been labeled “the next The Fault in Our Stars.” (As if a great YA novel can’t stand on its own.) Her fourth book, Landline, is the best-selling author’s first novel of adult fiction since her 2011 debut, Attachments, but the labels aren’t worth stressing: Landline might not have any teenage protagonists, but it does have all the pleasures of Rowell’s YA work — immediate writing that’s warm and energetic — even if it’s not her strongest love story to date. MoreGeorge R.R.