At the end of last school year, I bought a hardback copy of each of the first four books and gave them (privately) to the one sixth grade student I'd been reading the series to who seemed to be the most "into" the stories. I had exactly enough time to finish "Sorceress" before school was over, so I hope she's read "Necromancer" by now.
Wish I'd known about this boxed set a few months ago! But then again, I got the books at Costco so they cost about half of what B&N charges.
And in a week, I get to start reading again, to a new class of 6th graders!