Toby and Lucas made a list of things to do the summer before they entered middle school--but now Lucas is gone. Toby sets out to fulfill the promise he made to his friend: to finish the list by hiking the Appalachian Trail, from Velvet Rocks to Mt. Katahdin. It's an undertaking that he is poorly prepared for...and which will become not only a struggle for survival, but also a rescue mission for the starving and abused dog Toby finds along the way.
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