Résumé du livre

9 mars, 1944 - France

Dear Anna,
Comme promis, je t'envoie la première énigme. Ne t'inquiète pas. Personne ne pourra comprendre sauf toi.

A letter keeps my francs from harm
And five riddles protect them
For while they're hidden on my farm
No one but you can get them
So can you find the first riddle ?
It's hidden in your bedroom
Your eye won't find it, 1 suggest
You sweep it with your best broom

Good luck,
Jeannette