Attention Trombone players out there!?

Hey, I play tenor trombone too! Yeah, anyways. Um, my director lent me a couple of these books that have these studies for the trombone. I don't know if they are at the level you would want it though. I'm still in high school and I don't know what level you are at; but either way if you want I can scan a few into my computer and e-mail them to you. They don't seem that hard to me but they seem like some pretty good excercises to practice on during your offtime.