I get that the fifth step is optional, but who knows.
You should at least try the "bouillabaisse" to pay your respects to Alain Colmerauer. It's a dish from Marseille where Alain Colmerauer was from. Sadly, he passed away but his personal home page is still up. There are tons of interesting material there for you to read.
http://alain.colmerauer.free.fr
A Brief History of Prolog: http://alain.colmerauer.free.fr/alcol/ArchivesPublications/PrologHistory/19november92.pdf
and if you want a really more involved introduction: http://alain.colmerauer.free.fr/alcol/ArchivesPublications/Prolog3/acmprolog3e.pdf