Knowledge in colour ...

Who wouldn't want to spend an afternoon in the library with such a colourful read?

I wonder what percentage of landfill is designated to sets of redundant World Book encyclopedias? Surely it must be significant, as they have been revised and published since 1917.

Remember the 'old days' when this was the major soure of knowledge for school projects? Supplemented by writing away to companies etc asking for their information packs, then cutting and pasting everything onto a sheet of cardboard?