What is the theme of the book called "the judas child"

pl help

its for my final semester exam , if not i fail

The book is a mystery novel about the disappearance of two young girls three days before Christmas. The novel has a lot of characters, very different from each other and there are plot twists regarding the characters (and the person who is guilty) so you understand that is wrong to judge the characters superficially without actually knowing about them.

Explanation:

"Judas Child" is a mystery novel written by Carol O'Connell and published in 1999. It's known for having a very good ending. To complete the exercise, you have to explain which is the theme of the novel.

1. read the following excerpt from franklin d. roosevelt's "fireside chat 19":

on the other side of the picture, we must learn also to know that guerilla warfare against the germans in, let us say serbia or norway, us; that a successful russian offensive against the germans us; and that british successes on land or sea in any part of the world strengthen our hands.

remember always that germany and italy, regardless of any formal declaration of war, consider themselves at war with the united states at this moment just as much as they consider themselves at war with britain or russia. and germany puts all the other republics of the americas into the same category of enemies. the people of our sister republics of this hemisphere can be honored by that fact.  

the true goal we seek is far above and beyond the ugly field of battle. when we resort to force, as now we must, we are determined that this force shall be directed toward ultimate good as well as against immediate evil. we americans are not destroyers — we are builders.

analyze the effectiveness of this excerpt. how does it function within the speech as a whole? how does the structure of the excerpt to convey the speech's purpose and key points? support your argument with evidence from the speech. (10 points)