[phaet0n]

Why would you link directly to this?

Anyway, anybody who's anybody knows that "Théorie des espèces et combinatoire des structures arborescentes" is what you should be reading, since the later English version isn't as good.

[espeed]

You mean this book by Leroux and Labelle? http://bergeron.math.uqam.ca/species/

(First 3 chapters: http://bergeron.math.uqam.ca/wp-content/uploads/2013/11/book...)

"Enumerative Combinatorics" is a different book by a different author (Richard P. Stanley, https://en.wikipedia.org/wiki/Richard_P._Stanley).