I don’t actually have too many books about aliens, but this was one I checked out from the library a while back. If you can find the 20th anniversary edition, it’s worth it for the author’s notes scattered throughout. This trilogy got me excited about Star Wars again. (I read it just before The Force Awakens came out.) Thrawn is an amazing villain. He’s intelligent, and capable, and cunning. If you only read one set of Star Wars books, make it this trilogy.
The 90s In July index post is here.