Steve Perry, 1996
The only reason this book is as low on the list as it is is because its been so long since I've read it, and sadly I don't remember everything about it. I do remember, however, that is was one of my favorites that I read as a kid.
Unfortunately, that's about all I remember about the book. The reason it came about was awesome though: Lucasfilm had the idea to create a story told through various media, leading to the novel, a video game, a toy line and a comic series.