Hello,
I am assuming you mean the Alfred’s Piano Lesson Book: Complete Level 1 book because I started with that one but please correct me if I’m wrong. I would recommend the Solfeggietto in C minor by C.P.E. Bach, or the Bach Ave Maria, those are the only two i can think of that would be around his level other than the pieces from the Anna Magdalena book. These might be a little challenging for his level but I would definitely look into them.
I didn’t have much help to offer but I hope this helps,
Alex