Holy crap I haven't thought of that book in years.

It was my first "real" novel I fell in love with and must've re-read it at least 20 times over the years. Got to the point I would polish it off in an afternoon for fun.

11 is fine age to read Milo's little adventure, I was probably around there when I picked it up too. Yeah, he might miss some of the drier wit and subtle wordplay, but that makes revisiting a story when you know all the main beats to really chew over the little details all the richer an experience.

Have at it.