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This book is about a boy named Zack Goodspeed. He's normal, but his grampa is not. His grampa is makes inventions, lots of inventions. Zack thought he knew everything about his grampa. Until he finds an elevator in the woods. At the bottom he finds.... wait I can't ruin the story for you. You will have to read it for yourself.
I really liked this book. It keeps you reading. If you think this book is a boring science fiction novel with aliens, well, you're wrong. No aliens, but lots of adventure. Personally if I pick up a boring book and try to read it my brain shuts down. With this book my brain as 100 percent allert. I really liked this book and I know you will too.

Abby, 13 year-old.