As the comment below points out the author did not create Racket. However there is an author (Donald Knuth or DEK as he is known) who did just that: create a new language (two of them: TeX and METAFONT) for typesetting and making fonts, created new fonts (Computer Modern), published a series of books about the languages and the fonts, AND the programs that implement these languages. Then he used his creations to typeset his 'The Art of Computer Programming' (or TAOCP) books.
And don't forget about Leslie Lamport, who created LaTeX and won the Turing Award for his work on distributed computing systems (as part of which he designed the TLA+ language).
