It feels sort of mean trashing “Book of Love,” a bilingual romantic comedy that offers a clever premise but never truly delivers on it in satisfying fashion. Sam Claflin plays an author whose latest novel, “The Sensible Heart,” is a major dud. But the book becomes a huge hit in Mexico when the translator (Veronica Echegui) rewrites the whole thing in Spanish, turning it into a hot-and-heavy bodice ripper. The lack of chemistry and distractingly chintzy production values detract from an idea that had potential. My review, at RogerEbert.com.