Specifically, the author takes issue with similarities between Assassin's Creed's Animus technology and his own 2003 novel Link, reports GamesIndustry.
According to the suit, Beiswenger's book details "the conception and creation of a link device and process whereby ancestral memories can be accessed, recalled, relived and re-experienced by the user."
Beiswenger's case also cites that both his book and Ubisoft's games make references to religion and historical assassins. The case cites a number of examples from the book, including the following dialog from page 290:
"'If John Wilkes Booth fathered a child after he assassinated Lincoln, and we found a descendant alive today, we could place Booth at the scene and perhaps smell the gunpowder'. 'Ancestral memories?' 'As far back as you want'."
Beiswenger is asking for $1.05 million in damages in relation to the existing games, their guide books, comic books and two game trailers. If it is deemed that Ubisoft wilfully copied Beiswenger's novel, the amount is raised to $5.25 million in damages.
The suit also asks that the judge prevents the release of Assassin's Creed III and all related media and products.
Ubisoft has not yet issued a statement in response to the suit.
Assassin's Creed 3 is on course to become Ubisoft's most pre-ordered game of all time, having chalked up more advance sales than its predecessors in North America in just three weeks.
Assassin's Creed 3 will be available for Xbox 360, PC, PlayStation 3 and Wii U on October 31 worldwide.
> Assassin's Creed 3 first-look preview
Watch a trailer for Assassin's Creed 3 below: