Popsugar Parenting Siblings What Are Bookend Babies? Cute Photos of "Bookend" Siblings That Prove You Shouldn't Be Too Worried About Big Age Gaps 25 November 2019 by Alessia Santoro View On One Page Photo 9 of 11 ADVERTISEMENT () Start Slideshow Share This Link Copy ← Use Arrow Keys → 9 Previous Next Start Slideshow SiblingsParentingPhotography