I saw him present one time, perhaps it was RacketFest (Racket programming get together with lots of demos). He does a lot of creative project and his Racket boo

I saw him present one time, perhaps it was RacketFest (Racket programming get together with lots of demos). He does a lot of creative project and his Racket books look good. Few things are better than someone having a personal need for something (in his case his own typesetting and publishing tools), builds the tools, then writes books about it.