I found out about this book because the author's tweet (saying he wrote it in Racket) was retweeted by @racketlang https://twitter.com/mbutterick/status/3597687

I found out about this book because the author's tweet (saying he wrote it in Racket) was retweeted by @racketlang https://twitter.com/mbutterick/status/359768757733826560 https://twitter.com/mbutterick/status/359768757733826560