Newly promoted, Captain Tachikoma nows lead her team to another world. Now they must through a portal that only opens once every six months.

Her mission. Retrieve unimaginably advanced alien technology that could change the world. Keep her team alive with only one chance to return.

Nothing could prepare her for what waits on an alien planet.

This gripping addition to the Gate Walker series, humanity expands its exploration of the galaxy to reveal more secrets, in "Ghost Dog" Tachikoma needs all of her combat armor skills to get home.

"This story is great, with a very firm grasp of the Marine Corps lifestyle." - Sgt D. Barrow, USMC.
"High concept, high calibre character-driven MilSF. Compulsively readable." - Alex Stewart aka Sandy Mitchell, author of the Ciaphas Cain series.