Twenty years ago, Kelly Klein released her first Pools tome, a tribute to the swimming pools around the world in all their various forms. Klein, the ex-wife of Calvin Klein, is back again with a new set of iconic images from some of fashion’s finest photographers, including Steven Meisel, Juergen Teller, and Theo Wenner, in her follow-up book, Pools: Reflections, out this month. “I felt enough time had passed to do the sequel,” Klein tells Style.com. “I’m a bit obsessed with the architecture of pools and the water—swimming is such a form of relaxation for me.” This latest rendition combines pools with fashion, architecture, sculpture, and art. From a Mert Alas and Marcus Piggott photo of a naked Sasha Pivovarova to a Patrick Demarchelier photo of two lovers underwater, this edition is certainly sexed up from the last. One of the book’s highlights is a Bruce Weber photo, featured on a limited-edition ATM T-shirt ($85) on sale at Barneys. (ATM designer Anthony Thomas Melillo also just launched cashmere styles of his namesake label exclusively at Barneys earlier this month.) “I choose the guy and girl underwater photo by Bruce Weber because of how sensual it is,” Klein explains. “You feel what it’s like to be floating underwater with someone—it’s sexy.” There’s also a limited-edition ATM T-shirt being sold by ACRIA (all profits from the book are being donated to the organization). Here, the Weber shirt makes its debut on Style.com before this evening’s private book party at the Barneys New York store.