Who would ever think that a dictionary could be so entertaining?  But, The Lover's Dictionary by David Levithan is!  Levithan is well known for his popular young adult novels and this is his first adult novel.   Here, he cleverly uses about 200 unusual definitions from A to Z to tell the story of a couple who meets online, moves in together and then struggles to survive infidelity.  This is a beautiful, touching, and inventive story.