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By the Author
![Up Periscope!](https://www.hachettebookgroup.com/wp-content/uploads/2024/03/9780316565486.jpg?w=190)
Up Periscope!
![A Computer Called Katherine](https://www.hachettebookgroup.com/wp-content/uploads/2018/09/9780316435178.jpg?w=190)
A Computer Called Katherine
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Up Periscope!
A Computer Called Katherine