For me choosing a single book that I love is impossible.  Choosing one I hate is in some ways easier. There are two that fall in that category.  F. Scott Fitzgerald’s The Great Gatsby. Because the only character I liked (Gatsby) died. And Stephanie Meyer’s Twilight.  Because it offended my sensibilities.  Vampires Do Not Sparkle! That is the only books I have ever hated. Otherwise I have usually enjoyed and loved all the books I have read.