Little submarine enthusiasts will squeal with delight as they plunge to the deepest depths of the sea aboard a mighty sub. This beautifully illustrated board book features naval subs such as the Ohio, Seawolf, and Los Angeles vessels, the submarine control room, submarine crew, deep-sea submergence vehicles, deep-submergence rescue vehicles, recreational submarines, and more. This book is part of the bestselling Good Night Our World series, which includes hundreds of titles exploring iconic locations and exciting themes.Good Night Submarines takes young readers on an unforgettable journey below the sea.