Sunrise, thank you! I'm one of the guilty ones that interchanges "loose" and "lose". I'm gonna copy and print out what you said so maybe I won't make that mistake again.

As for "their, there, they're"... "Their" shows possesion; "their" book. Yeah, no apposterphe. "There" is a place, "Put the book over THERE." "They're" is a contraction for "THEY ARE"; "THEY'RE getting THEIR books from over THERE." Is that clear as mud?