Stormblood by Jeremy Szal

Available from Nook & Cranny Books when we last checked. Sold from the shop’s own store; the price there is the one that counts.

Vakov Fukasawa used to be a Reaper: a bio-enhanced soldier fighting for the Harmony, against a brutal invading empire. He's still fighting now, on a different battlefield: taking on stormtech. To make him a perfect soldier, Harmony injected him with the DNA of an extinct alien race, altering his body chemistry and leaving him permanently addicted to adrenaline and aggression. But although they meant to create soldiers, at the same time Harmony created a new drug market that has millions hopeless