Looking at the ThinkJulia text, we find many references to Monty Python. Quoting a ThinkJulia repo issue we read
It's not just "Monty". It's all the examples that have to do with sausage, eggs and spam, references unladen swallows, pining for the fjords, only a flesh wound, "Nee!", John Cleese, Eric Idle and things like that. By tradition, Python instructional material is chalked full of this kind of stuff.
The Monty Python references made for a nice pun in a book about Python (which is where ThinkJulia came from), but are less appropriate for Julia and for a Spanish-language book about Julia. Perhaps referencing Don Quijote is more appropriate?