Popsugar Love Valentine's Day Books to Give For Valentine's Day 21 Books to Give Your Friends or Lovers This Valentine's Day January 30, 2016 by Annie Gabillet View On One Page Photo 9 of 21 ADVERTISEMENT () Start Slideshow Share This Link Copy ← Use Arrow Keys → 9 The Science of Kissing Even a good kisser can learn a thing or two. The Science of Kissing provides a lesson in the evolutionary and cultural history of the kiss. Previous Next Start Slideshow Valentine's DayGift GuideBooksBook Roundup