1988 the macmillan prize

Mark won MacMillan Books’ prestigious annual award for writing
and illustrating a children’s book in 1988. ‘Alphabet City’ was devised
while he was studying graphic design at Camberwell and was an interactive piece, part-book, part-toy. The main idea of the book was that readers would press out and make models of different parts of a notional city, each beginning with a letter of the alphabet, such as A for airport, D for docks, O for Opera House,V for VIP and so on. These models would then be a starting-point for inventive play, as young darlings would create stories around the citizens.
 
Prize judge Raymond Briggs understood that it would be a complex piece
to engineer due to the costs involved in manufacturing, but enthusiastically
endorsed the strong artwork and the Belloc-style rhyme-schemes.