In the spirit of the recent Valentine’s Day, here are some bibliobonbons to celebrate our love of books. Heart-shaped books seem to have been a craze in the 15th and 16th century. Below are a couple of beautiful examples, an illuminated music book and a prayer book (the shape symbolizing a heart open to God). There were also blank heart-shaped books that the owner could use to collect favourite love ballads. You can see an example of this and others at Ludmila’s livejournal page.