Alarm: E-Boats!(Kobo/電子書)

Target Unidentified(Kobo/電子書)

Stand by to Ram!(Kobo/電子書)

Command(Kobo/電子書)

Battle Ensign(Kobo/電子書)

Enemy in Sight(Kobo/電子書)

Coffin Island(Kobo/電子書)

Killer Ship(Kobo/電子書)

Frogman!(Kobo/電子書)

Presumed Sunk(Kobo/電子書)

The Surgeon (Word War II Naval Adventure)(Kobo/電子書)

The Captain (A Word War 2 Naval Adventure)(Kobo/電子書)

The Weak Link(Kobo/電子書)

Target Battleship (WWII Naval Adventure)(Kobo/電子書)

Night Encounter (A WW2 Naval Adventure)(Kobo/電子書)

Dive! Dive! Dive!(Kobo/電子書)

The Challenge (A World War 2 Naval Adventure)(Kobo/電子書)

Convoy (A World War 2 Naval Adventure)(Kobo/電子書)

The Blind Eye (A World War 2 Naval Adventure)(Kobo/電子書)

The Recommend (A Word War 2 Naval Adventure)(Kobo/電子書)

Brood of the Eagle(Kobo/電子書)

The Coxswain (A World War 2 Naval Adventure)(Kobo/電子書)

Find and Destroy (A Word War 2 Naval Adventure)(Kobo/電子書)

Escort Ship (A World War 2 Naval Adventure)(Kobo/電子書)

The Gunner (WW2 Naval Adventure)(Kobo/電子書)

Eagles Over Taranto (A World War II Naval Adventure)(Kobo/電子書)

Mutiny!(Kobo/電子書)

The Secret Weapon(Kobo/電子書)