Obake Neko (Ghost Cat): A Pacific Tale

It begins with a disappearance...
In the waning days of World War II, the Obake Neko is the last surviving Sen-Toku--a huge secret aircraft-carrier submarine created by the Imperial Japanese Navy. As the war comes to an end, the Obake Neko sets sail back to Japan with a cargo of unimaginable value. In the chaos of Japanese surrender, the clandestine vessel and its crew vanish in the seas of the South Pacific.
Fifty-five years after the war's end, former U.S. Navy pilot, Bud Brennan breaks into Pearl Harbor's submarine museum in Hawaii. Bud's son, Mike, is still raw from the death of his wife and grappling with a new career but still jumps in to help his dad.
But when Bud's antics garner the attention of the Navy's JAG, Mike realizes his father may possess knowledge about the near-mythical Obake Neko and its fabled cargo--knowledge that is also of great value to the Japanese Yakuza.
Now, Mike must scramble to learn the whole truth of his father's decades-old connection with the legendary Japanese submarine and fight to defend his father from relentless military authorities and deadly Yakuza operatives.
Even decades later, the Obake Neko and its legendary cargo are still worth killing over. Can Mike discover the truth and protect his dad before deadly assailants succeed in silencing Bud forever?