I have been thinking of my book as MG, but the more I think about it, the less I'm sure.
My main character is eight years old at the time of the book's events and is looking back at it after the fact, at the age of nine. However, he is based partially on a real kid who has been classified as gifted and has a very advanced vocabulary.
It's a relatively short book, just over 24,000 words.
So I think it is somewhere in between a chapter book and an early middle grade one, but I'm not sure exactly how to classify it. And I suppose I need to be able to do so if I intend to pitch it to agents. (Which I do.)
Hmm....
I am thinking of posting it on this board for critique, but only after an edit and revision.