Is Grace's family more well off than they were when she was in school?

In which Grace causes trouble...

To close the mill, or not to close the mill?

What are Miss Lesley and Arthur hiding?

Can Grace pull of the book heist? And what are Arthur and Miss Lesley keeping secret?

Will Grace be able to get Arthur's book back? And why is Arthur asking silly questions about his fingers and the frames? 

Can Grace learn the ins-and-outs of mill work? And what is Arthur reading?

Will the secondhand at the mill notice Grace isn't old enough to work yet?

What secrets does Delia know about the mill? And just what are Grace's parents hiding in that big trunk?

Someone comes knocking on Grace's door--who could it be?