Yes, there is. It is a noval that was only released in Japan. There are a large amount of Dot hack novals that were NT brought over to the US. They are worth checking out if you are a hard core dot hack fan.
~Ghost
The complete .hack series can be found on various platforms such as PlayStation consoles (PS2, PS3, PS4), Steam, and other digital distribution services. You can also find physical copies of the games on sites like eBay or Amazon.
From what I've seen, nowhere, unless you can read Japanese.
At www.mangafox.com or www.onemanga.com
dot hack infection
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in the original 4 games it's called "Mutation", in the G.U. series of games it's called "Reminisce"
There are 8 book of 1000 (Ryu Books) in the original dot hack games.
.hack//G.U.+ is a manga adaptation based on the .hack//G.U. video game series, while .hack//G.U. is the video game series itself. The manga follows the same storyline as the games but provides a different medium for fans to experience the story.
Dot hack//roots. ~Ghost
You can purchase Dot Hack Roots episodes from various online retailers such as Amazon, iTunes, or Google Play. Additionally, you may be able to find them on streaming platforms like Crunchyroll or Funimation.
There is already an online game inspired by the .hack series called "The World R:2" that was released as part of the .hack//G.U. series on PlayStation 2 and PlayStation 4. It allows players to experience a virtual MMORPG within the game's storyline.
The webpage Dot Hack is a Japanese multimedia webpage. It is a project involving anime and video game installations, developed by the company CyberConnect2.
The ".hack" series features a fictional digital world, so there isn't a real "dot hack cell." However, in the series, players interact in a simulated online game setting, connecting with other players through virtual avatars and exploring a complex digital environment. If you're interested in the series, you might want to check out the various media adaptations like games, anime, and manga.
While there has been no news of such a thing, it may occur in the future and they do not wish to release that type of information at this given time.
Yes, ".hack//Roots" has been released in America. It is a 26-episode anime series that serves as a prequel to the ".hack//G.U." video games.