The Fleet by John Davis

http://www.barnesandnoble.com/w/the-fleet-john-davis/1119234300?ean=2940046032871&cm_mmc=AFFILIATES-_-Linkshare-_-TnL5HPStwNw-_-10:1&r=1

Welcome to life in orbit. After a plague surges out of control, the infected begin to overrun humanity's cities one by one. Forcing those who survive to take orbit. Commander Dalton James has walked many paths. Most of them in search of whiskey.

 

As the fleet discovers a brand new race and its horrible secret, however, Dalton may just be the right man for the job. A rugged brown coat to his back and revolver hanging from his side, Dalton James ...