A 3.5, really... Or even a 3.8. I liked it and I'd like to read the rest of the series; it was great to read about the Egyptian gods, and Rick Riordan is obviously quite a mythology buff. But for some reason I didn't like it quite as much as the Percy Jackson books, the original series or the new one. Maybe that will change when I get the second one. In any case, definitely a fun middle grader.