I believe you are thinking of Dr Dan Streetmentioner's Time Traveller's Handbook of 1001 Tense Formations (as product-placed in The Restaurant at the End of the Universe, by Douglas Adams).
Dr Streetmentioner's book wioll haven be on-salen in good bookshops near you presooning!
no subject
Dr Streetmentioner's book wioll haven be on-salen in good bookshops near you presooning!