@Jen Aside,
I hope there is severals answers because if they don't count the "pragmatic" one I will kick their %$£ ! No one can make fun with algebra, not in front of cartesians ! (Is french humour not so good to translate ?)
Anyway, i think we agree with the fact that LC of this week is a machiavelic one, they tease us and I assume it works ^_^
Thanks for the personns who said the gift was a clue
But I merged clue with uninteresting ... Like you thought you don't care about this LC because the book wasn't rare or costly.
So, great pass, but poor reception. Stupid me. -_-"