Like the TV series, most of the books have two parallel storylines that converge at the end, and most of the novels take modern day issues and put a slightly alien twist on them.
Light-years away, a Tenctonese slave named Stangya Soren'tzahh (later to be known as George Francisco) is swept up into his people's fight for freedom against their ruthless masters, the Overseers.
The slave ship crash lands on Earth, where Matt and George unknowingly work together to prevent a disaster that could destroy both their species.
George Francisco's wife & eldest daughter are infected with the bacteria, and as they lay close to death, a threat to the whole world appears.
The plot concerns a journalist named Micky Cass who goes undercover as a Newcomer to expose the racism and discrimination suffered by the Tenctonese.
The plot follows Matt who meets a mysterious woman from his past and is thrown into an investigation of a lethal Newcomer drug.
The case causes tension to mount between Matt and George as they discover that some Newcomers will do anything to assimilate into human society - even if it means their destruction.
It sees Matt, the Franciscos' and Cathy attending a conference in Pittsburgh when a series of murders has them suspecting a Tenctonese creature is on the loose.
The most radical of all of the books, "Cross of Blood" explores the possibility of Tenctonese female Cathy Frankel getting pregnant with human Matt Sikes' child.