i would change "series known as"... maybe "first novel in the "Bitter Cycles of Man" series"

I would also change "has released" to "announces the release of"

I'm not 100% sure but maybe grammatically the next sentence should have a few commas, IE, "The book, entitled "The Oort Perimeter.", tells...."

One more thing, is there a punctuation in the title of the book? weird man, weird...

ahhhhhh actually, it would be better to put the book title in the first sentence and the series in the second. IE, "Steven Lake, a well known and respected writer and reviewer in the Information Technology sector, announces the release of his new novel, entitled "The Oort Perimeter". The book, as the first part of the "Bitter Cycles of Man" series, tells...

I'd say "which is tasked" rather than "who is tasked", given that it is an organization. I'd also take out ",and who all live on it" from the book description, kinda awkward and unnecessary.

One thing I'm noticing is that a lot of sentences have bits tagged onto the end that really should be integrated, such as "who wish its destruction".. try this "from the myriad of hostile alien races spread across the three galaxies."

minor issues:

This novel is book 1 of a total of 15 novels in the "Bitter Cycles of Man" series which is divided into three sagas: Earthfleet, Lost Fleet, and Lost Races.
(if you've put quotes around all the other titles, why not put them on the sagas?)