Did you ever find a book so fascinating you wanted to look at every copy in the world? Put that way I guess it sounds a bit mad, but that’s exactly what I’m planning on doing. Last weekend I started a new project – a census of Hooke’s Micrographia. Basically this means that I want to locate and describe every surviving copy of the 1665 and 1667 printings of Micrographia. It might be quite a mammoth task – my rare books guru has suggested there might be up to a thousand copies lurking in libraries and private collections around the world . . .