for Project Jackalope by Emily Ecton
From the Publisher
Jeremy's troubles begin when his eccentric neighbor leaves him an "experiment" for safekeeping—a jackalope! This so-called mythological creature looks like a bunny rabbit, but comes with razor-sharp antlers and is purported to be a ruthless killer. When government agents show up at Jeremy's house seeking the jackalope for their own nefarious purposes, Jeremy must find a way to protect the jackalope, and himself. So he reluctantly joins forces with Agatha, his holier-than-thou genius neighbor. Together, with the jackalope (and his weapons-grade antlers) tucked away in a backpack, they have only one chance to save Jack and still get their science fair projects in on time. With her striking sense of humor, Emily Ecton has created a hilarious and suspenseful adventure, complete with a compelling and unforgettable cast of characters.
Publisher description retrieved from Google Books.