When we got DS's lexile results sent home, it came with instructions on how to find books in his range using the book wizard I think. The most important thing is to just name ONE or two categories of what you like. I made the mistake of naming lots of categories, and got a list with way too much variety...in other words, it didn't help me choose. So I picked "fantasy" only and got a nice list. Picking fantasy and adventure and science fiction and science and history was the wrong way to do it, even though DS is interested in all those things.

Have you tried that Antsy-Pantsy?

And don't forget (since our kids go to the same school) that you have to write a permission slip if the books are YA.