Resistance trilogy

1.

When their friend Henri's parents disappear and Henri goes into hiding because of his Jewish ancestry, siblings Paul and Marie must convince the French Resistance that even children can help in their fight against the Germans.

3.

In 1944, as Allied forces move to retake France from its Nazi invaders, the Tessier siblings risk their lives once more and journey to Paris, where they are to deliver top-secret intelligence to Resistance workers.