This is a lot of 2 paperback books in The Saga of the Seven Suns by Kevin J. Anderson:
Book 1 Hidden Empire
Book 2 A Forest of Stars
Paperback 654pp, 682pp, Science Fiction
Aspect, Warner Books, 2003, 2004
Condition: used, both books are in good condition with light edgewear and clean, tight pages. Book 2 has a small piece of the very first description page torn off at the top right corner.
Book 1: Having colonized the worlds of the spiral arm, mankind’s three branches, the Terran Hansa, starship-dwelling Roamers, and telepathic Green Priests, are certain the galaxy is theirs for the taking. But when scientists successfully test a device that transforms gas giant planetd into new suns, humanity soon discovers the brutal, horrifying price of arrogance in deep space.
Book 2: Five years after attacking the human-colonized worlds of the Spiral Arm, the hydrogues maintain absolute control over stardrive fuel...and their embargo is strangling human civilization. On Earth, mankind suffers from renewed attacks by the hydrogues and decides to use a cybernetic army to fight them.