Martin Luther King, JR

I am wanting to teach a unit on nonviolence. *I want to use Stride Toward Freedom or Why We Can't Wait as my extended text for this unit. *This will be a unit taught in January/February to 9th grade. *My problem is that I can', for the life of me decide which book to have them read. *Has anyone used these books before. *If so, how did it go and which would you recommend?
Thanks,
Crystal*

I read Why We Can't Wait, which has the iconic essay "Letter from Birmingham Jail" which is worth the entire book right there. So, being as I haven't read the other title that you have there, I'll cast my vote for Why We Can't Wait.