Programming book

Hi! I was listening to one of the BM podcasts and Austin recommended books by (what sounded like) “John Kailey/Caley/…?”

(Austin also mentioned recommending this author on YouTube).

I’ve tried every way I could think of to try to find out who this is… failed Google searches, seeing if Alan T. also had the guy on his reading list, etc etc. to no end.
Maybe I’m just way off on the spelling.

Can you please help me out?

Thanks!

Chris

John Kiely (and it’s not a book - but published in the scientific literature)