If you enjoyed the HTBM adventures and are looking for something a little grittier, check out Rise of Metal by RJ Roder:

Jon Carver is a man lost in the far reaches of the universe. A tragic encounter with strange alien forces has left him part man, part living metal. Scraping by as a hired gun on a rundown space station at the edge of civilized space, Carver’s the guy you call when you have a job that no one else wants. It’s not much of a life, but it pays the dock fees on his dilapidated ship. Now his past has returned with a vengeance. He’s made powerful enemies… enemies intent on destroying all he’s built. To survive, Carver must fight to protect the one thing he holds most dear and maybe save a galactic empire in the process.

Amazon.com: Rise of Metal: The Carver Chronicles eBook : Roder, RJ: Kindle Store