Just found the DVD on Amazon: https://www.amazon.co.uk/Gate-Collectors-BLU-RAY-DVD-Combi/dp/B074NFQPG4/ref=sr_1_1?ie=UTF8&qid=1518442818&sr=8-1&keywords=gate+anime

it should be coming out in early March!

While all the anime/manga relations I can think of have already been mentioned, I can think of a number of Novels.

1) 1632 (aka The Ring Of Fire) Series.

Consists of roughly 40 books, with branching timelines. All the Timelines start with 1632 and 1633.

TLDR: The small american town of grantzvile and everything in a 2 mile circle is dumped in Germany during the middle of the cluster fuck that was the 30 years war.

[Summary of the first Novel.](/s "First thing they do is intervene in the pillaging of a nearby farm, second thing they do is rofl stomp a formation of ~600 french cavalry thanks to a nam vet and his M60 he had taken home with him , along about half the town arming themselves with bolt action hunting rifles and a few AR's. They then go on to form an alliance with Sweden, teaching them how to build and manufacture weapons that Sweden is realistically capable of mass producing like early 1800's era muzzle loading rifled muskets and breach loading cannons")

And they don't just go rofl stomping everything like the JSDF does, (Remember while gunpowder in the 15th century was still in it's early stages and melee combat was still the norm, it is still perfectly capable of killing someone) Such as when [Spoilers for 1633 & 1634: The Bavarian Crisis](/s "the spanish armada shows up, they manage to repel them with rocket artillery and napalm put together in the high school science lab, but they lose one of the 2 Fighter bombers they had built (Imagine a hellcat built with the Wood & Canvas materials of a WW1 Bi-plane and a Toyota Camry engine) and The only water craft that had come through with them, a speed boat with a jury-rigged knock off Katyusha launcher bolted to the deck. (Crew was almost all killed by 4 frigits broadsiding the speedboat with grape shot until they got lucky, then the only survivor Kamikazed the sinking boat into one of said frigits")

2) The Axis Of Time Trilogy

Consists of 3 books (In order); Weapon of choice, Designated Targets, and Final Impact. The first two books are available online in PDF format (Just ask and you'll get some dank links fam), the third book is paperback only as far as I can tell.

(W.I.P)