[Dylflon]

I remember it now! Mako's name jogged my memory.

And the Han Solo books completely cover Han's and Chewie's meeting.

Chewbacca was gambling in a seedy bar and I believe he was accused of cheating. One of the guys he was playing against was going to shoot him but Han shot the guy first. Chewbacca then began following Han and when Han told him to go away, Chewbacca told him that he now owed him a life debt and would follow him wherever he went.

I should reread those books.