Diagram of diagrams.

At a rather nice B&B in Norwich I went to this year, there were two books left by the bed: "The Illustrated Encyclopaedia of Sexual Love" and "Sainsburys: The Best Butter in the World." Which I thought were not only odd in themselves, but also in their juxtaposition.

I own a copy of "Div, Grad, Curl and All That: An Informal Text on Vector Calculus" - which is actually a very well known and highly regarded book (in it's field).

I was delighted to find a book with the title "ENTS" as I've always wished Tolkien had said a bit more about them. I am fairly sure that Tom Bombadil must be older then Treebeard but I'm not certain and I was hoping for an account of the origins of the tree shepherds... I was very disappointed to find it was a book on ear, nose and throat problems :o(