Download or read book Zack Files 01: My Great-grandpa's in the Litter Box written by Dan Greenburg and published by Penguin. This book was released on 1996-08-06 with total page 68 pages. Available in PDF, EPUB and Kindle. Book excerpt: What I wanted was a cute little kitten. Instead, I got a tough tomcat that talks. And that's not all! He says he's my Great-Grandpa Julius and he needs my help. And messy litter box or not, family is family!