The Han Solo Adventures

The Han Solo Adventures by Brian Daley
Some of the earliest Star Wars novels from the 1970s and 80s, this is a trilogy of stories about the misadventures of young Han Solo and Chewbacca. Originally published as three separate books, now in print only as a combined paperback volume.

Buy from Amazon:
(Combined 3-in-1 paperback)
Han Solo at Stars' End (vintage)
Han Solo and the Lost Legacy (vintage)

This is a classic era series from the Legends timeline. It will likely be contradicted by newer books, movies, or TV shows (if so, just think of it as an alternate universe).