Mark Ragan
Submarine Warfare in the Civil War by Ragan, Mark K.
This activity book includes a code-breaking section for secret messages.
Submarine Warfare in the Civil War by Ragan, Mark K.
The illustrated field guide inside is my favorite part of the book.
Submarine Warfare in the Civil War by Mark K. Ragan (2002 Softcover)
This activity book has a maze on almost every page, each with a twist.
The Hunley : Submarines, Sacrifice & Success In The Civil War
A nice touch is the illustrated shadow box design on the front.