I recall it being a series of books, each being approximately 200 pages or so.
The main character I recall had 'bionic' powers - or, his skeleton was made out of some indestructible type of metal or something...
If I'm recalling it correctly he had a sidekick named 'wolf' perhaps?
Sorry, that's about all I can remember. Would LOVE to find this series again!
Edit: After googling 'science fiction metal skeleton' I turn up the 'Last Legionary' series by Douglas Hill. The name of the series rings a bell, the name of the main character rings a bell (Keill Randor), BUT... His sidekick is described as a telepathic 'bat' named Glr. I don't remember this... I could swear that the sidekick was some type of hairy creature named 'wolf' or 'bear' or 'baer'.... ?