Trail of the Spellmans (Docment #5) by Lisa Lutz.*
Lutz has included all the ingredients of her winning Spellman series recipe: copious footnotes and appendices, plus.this time, "copies" of school assignments created by her siblings. It's not as laugh-out-loud funny as the first book in the series, but you might still find yourself giggling to yourself.
*Many thanks to the publisher for the Advance Reading Copy.